Search results for "Chemical compound" - New World Encyclopedia

made by combining two or more different chemical substances (such as chemical ... * Chemical compound * Chemical element * Chemical substance ...

are nonsuperimposable mirror images. A compound is said to be enantiomerically ... environment, enantiomers have identical chemical and physical properties ...

== The chemical components of nucleosides == The nitrogen-containing ... lacks an oxygen atom present in ribose, the parent compound.) ...

In chemistry, chemical synthesis is the purposeful execution of one ... A chemical synthesis begins by selection of compounds that are known ...

A chemical reaction is a process that leads to the interconversion ... *Isomerisation, in which a chemical compound undergoes a structural ...

A chemical element, often called simply element, is the class of atoms ... The elements and their periodic physical and chemical properties are ...

pentose sugar ribose. Deoxyribose has the chemical formula ... A nucleotide is a chemical compound with three components: a nitrogen ...

properties, and methods of syntheses of chemical compounds that are based ... synthesized the biologically significant compound urea by evaporating an aqueous ...

Purine is a heterocyclic, aromatic, organic compound, consisting of ... compounds that are interconvertible by a chemical reaction). ...

can be described as follows. An ionic compound is dissolved in a solvent ... electrical energy into hydrogen's chemical energy—the energy lost ...

A hydrocarbon is any chemical compound that is constituted of just the elements carbon (C) and hydrogen (H). Each hydrocarbon molecule consists ...

are responsible for the characteristic chemical reactions of those molecules ... They determine the characteristics and chemical reactivity of molecules ...

Berkelium (chemical symbol Bk, atomic number 97) is a synthetic, radioactive ... time visible amounts of a pure berkelium compound were produced. ...

Main article: Chemical compound A compound is a substance with a fixed ... * Chemical compound * Chemical element * Chemical engineering ...

with a distinctive sweet tarry odor. Its chemical formula is C6H5OH and its ... The word phenol is also used to refer to any compound which contains ...

of physics to calculate the speed of chemical reactions, and showed that ... dimensional arrangement of atoms in a chemical compound. ...

A chemical equation is a symbolic representation of a chemical reaction ... The reactants and products are shown using their chemical formulas ...

In 1993, Bakelite was designated an ACS National Historical Chemical ... Co., Condensite Corp. and Redmanol Chemical Products Company, an early ...

Astatine (chemical symbol At, atomic number 85) is the rarest naturally ... According to experiments done with a mass spectrometer, the chemical ...

(O=C) linked to two other carbon atoms or a chemical compound that contains this functional group. A ketone can be generally represented by the formula: ...

insoluble in water and in most other chemical reagents. It has a Mohs ... quot; metal, it is not considered a toxic chemical by most governments because ...

In chemistry, a silicate is a compound containing an anion in which ... have linked tetrahedra, and their general chemical formula is (SixO3x)2n-. ...

tetraborate, is an important boron compound, a mineral, and a salt of ... as a fire retardant, an anti-fungal compound for fiberglass insulation ...

In chemistry, isomers are molecules that share the same chemical formula ... This finding challenged the prevailing chemical understanding of the time ...

(C=O) linked to a nitrogen atom (N), or a compound that contains this functional ... for the carbonyl-nitrogen compound and ['æmɑɪd] for the anion ...

atmosphere have changed over time and the chemical processes that create and ... may tell us that more of a chemical compound exists than previously ...

A covalent bond is a type of chemical bond characterized by the sharing ... of organic molecules. Moreover, numerous chemical reactions, in both living ...

Dynamite is the first safely manageable chemical explosive stronger ... operated by AECI (African Explosives and Chemical Industries). The demand ...

Protactinium (chemical symbol Pa, atomic number 91) is a member of ... * Chemical element * Inner transition metal * Metal * Periodic table ...

Pyridine is a fundamentally important chemical compound with the formula C5H5N. It is a liquid with a distinctively putrid, fishy odor. Its molecules ...

with additional terms involving the chemical potential and the number ... where \mu_i is the chemical potential for an i-type particle, and ...

For a chemical reaction to take place, it requires a certain minimum ... A catalyst may react with one or more reactants to form a chemical ...

human body from other compounds through chemical reactions and thus has to ... Threonine has the chemical formula CH3-CH(OH)-CH(NH2)-COOH, or more ...

A bleach is a chemical that can remove or lighten the color of an ... Household bleach, also known as chlorine bleach, has the chemical ...

Chloroethane or monochloroethane, commonly known by its old name ethyl chloride, is a chemical compound once widely used in producing tetra-ethyl ...

Even as a child Baeyer was interested in chemical experiments and ... associated with his ingenious theories of chemical structure. Baeyer's ...

Palladium (chemical symbol Pd, atomic number 46) is a rare, silver ... are unsure if this is a true chemical compound. Common oxidation states ...

Hydrogen cyanide is a chemical compound with the formula HCN. It is a colorless, very poisonous, and highly volatile liquid that boils slightly ...

Around this time, he discovered the compound phenylhydrazine, which he ... to a group of compounds that shared a chemical base. They could all be ...

A nucleotide is a chemical compound with three components: a nitrogen-containing base, a pentose (five-carbon) sugar (relatively simple carbohydrates ...

Phosgene is the chemical compound with the formula COCl2. This highly toxic gas gained infamy as a chemical weapon during World War I, but it ...

Acetaldehyde, sometimes known as ethanal, is an organic chemical compound with the formula CH3CHO (or MeCHO). It is a flammable liquid with a ...

In organic chemistry, an alkene, olefin, or olefine is an unsaturated chemical compound containing at least one carbon-to-carbon double bond ...

Silane is a chemical compound with the chemical formula SiH4. It is the silicon analog of methane and, like methane, it is a gas at ordinary ...

Ether is the general name for a class of organic chemical compounds ... == Chemical reactions == [[Image:Diethylether peroxide chemical structure ...

The process of forming diazoniums compound is called diazotation, ... in an aqueous solution of the diazonium compound, then a solution of the coupler. ...

and various co-enzymes. Ribose has the chemical formula ... atom and double-bonded to an oxygen atom (chemical formula O=CH-). ...

"ground state"). Given that a chemical element may exist as various ... atomic weights, which are ubiquitous in chemical laboratories. ...

Ruthenium (chemical symbol Ru, atomic number 44) is a rare, hard, ... are versatile catalysts for diverse chemical reactions. ...

Chlorine (chemical symbol Cl, atomic number 17) is a nonmetal that ... waters. Common salt or table salt is the compound sodium chloride (NaCl). ...

and physicist, who vastly expanded chemical knowledge by isolating and ... his laboratory while investigating a chemical compound of nitrogen and chlorine ...

Bromine (chemical symbol Br, atomic number 35) is a nonmetal that ... As bromine is a halogen, its chemical properties are similar to those ...

Californium (chemical symbol Cf, atomic number 98) is a chemical element ... used to produce element 118, the heaviest chemical element synthesized so far. ...

Thulium (chemical symbol Tm, atomic number 69) is the least abundant ... * Chemical element * Inner transition metal * Metal * Periodic table ...

*A chromatograph takes a chemical mixture carried by liquid or gas ... factor R'f, the run length of the compound divided by the run length ...

Ammonium sulfate is an inorganic chemical compound with the chemical formula (NH4)2SO4. It contains 21 percent nitrogen in the form of ammonium ...

Cerium (chemical symbol Ce, atomic number 58) is a silvery metallic ... is an oxidizing agent for quantitative chemical analyses, and cerium(III ...

Curium (chemical symbol Cm, atomic number 96) is a radioactive, metallic ... it feasible to study the element's chemical properties. The isotope ...

Ytterbium (chemical symbol Yb, atomic number 70) is a soft silvery ... . He suspected that ytterbia was a compound of a new element he called ...

Surface science is the study of physical and chemical phenomena that ... on the Nobel Prize in Chemistry 2007: Chemical Processes on Solid Surfaces ...

group by a single covalent bond. The chemical formula of the carboxyl ... Thus, in an aqueous solution, the undissociated acid exists in a chemical ...

Cesium (also spelled caesium, chemical symbol Cs, atomic number 55 ... and most alkaline of the stable chemical elements. Aside from francium ...

organic acid) and an alcohol (or phenol compound), although there are other ... * [http://goldbook.iupac.org/E02219.html IUPAC Compendium of Chemical ...

simplest representative of the group of chemical compounds known as ketones ... == Chemical synthesis == Most of the worldwide industrial production ...

Tellurium (chemical symbol Te, atomic number 52) is a relatively rare ... Tellurium compounds are the only chemical compounds of gold found ...

when he demonstrated that urea, a chemical produced in the bodies of ... of animals and humans. It had the same chemical constitution as ammonium ...

In chemistry, a base is thought of as a substance which can accept protons or any chemical compound that yields hydroxide ions (OH-) in solution ...

Acetylene is an unsaturated organic compound because its four atoms are ... == Chemical properties == === Structure === The carbon-carbon triple ...

of spectroscopy as a powerful method of chemical analysis. The bunsen burner ... of cacodyl, an arsenic-bearing compound. During this research, he ...

as a colored substance that has a chemical affinity to the substrate ... * Azo compound * Food additive * Paint * Pigment * Stain ...

Silicon (chemical element symbol Si, atomic number 14) is a member ... grasses. Also, silicic acid (a family of chemical compounds of silicon, hydrogen ...

Chromium (chemical symbol Cr, atomic number 24) is a hard, shiny, ... " Though misidentified as a lead compound with selenium and iron components ...

Nitrogen dioxide is a chemical compound with the formula NO2. It is one of the several nitrogen oxides. At ordinary temperatures and atmospheric ...

* [http://burningissues.org/table2.htm Chemical composition of wood smoke] Category:Physical sciences Category:Environmental science ...

Cobalt (chemical symbol Co, atomic number 27) is a hard, lustrous ... * Catalysts for the petroleum and chemical industries. * Electroplating ...

Similarly, an organic compound with multiple amino groups is called ... * remember that chemical compounds are not proper nouns, so lower ...

Cadmium (chemical symbol Cd, atomic number 48) is a relatively rare ... calamine, having been found in this zinc compound. For about 100 years, Germany ...

was essential in the bonding of chemical elements. Berzelius suggested ... springs where he conducted a thorough chemical analysis of the spring water ...

An aldehyde is an organic compound containing a terminal carbonyl ... the carbonyl group, yielding an addition compound where this carbon atom has ...

Tungsten (formerly wolfram) is a chemical element with the symbol ... Tungsten carbide (WC or W2C) is a chemical compound containing tungsten ...

Xenon (chemical symbol Xe, atomic number 54) is a colorless, odorless ... very inert, they are said to have a chemical valence of zero. Nonetheless ...

Bismuth (chemical symbol Bi, atomic number 83) is a brittle, white ... * Bismuth(III) telluride (Bi2Te3): This compound is a semiconductor ...

through ionic or covalent bonding. In chemical reactions they are neither ... that is responsible for the physical and chemical properties of the atom. ...

Ferrites are a class of ferrimagnetic ceramic chemical compounds consisting ... such as that is low in oxygen. The chemical composition and especially ...

Scandium (chemical symbol Sc, atomic number 21) is a soft, silvery ... or scandium trichloride (ScCl3): The pure compound is a white crystalline solid ...

Aniline, phenylamine, or aminobenzene is an organic compound with the formula C6H5NH2. It is an organic chemical compound, specifically an aryl ...

inorganic-organic polymers. Their general chemical formula can be written as ... dimethyl ketone (acetone) have analogous chemical formulas, therefore it was ...

(chemical symbol Pr, atomic number 59) is a soft silvery metallic ... or praseodymium trichloride (PrCl3): This compound is a blue-green solid that ...

toughness, curing rate, temperature, and chemical resistance. ... the adhesive hardens. Depending on the chemical composition of the adhesive ...

concepts for an understanding of chemical bonding. The first modern ... considered within the context of the chemical compound they are in, not as ...

Chloroform, also known as trichloromethane and methyl trichloride, is a chemical compound with the formula CHCl3. At room temperature, it is ...

of the spectrum, which strikes a phosphor compound deposited on the chip; the ... Biological molecules can be tagged with a fluorescent chemical group ...

is a mineral (inorganic) acid having the chemical formula H3PO4. Alternatively ... " which is the IUPAC name for this compound. The prefix ortho- usually ...

Chloral hydrate is a colorless, solid chemical compound with the formula C2H3Cl3O2. It is soluble in both water and alcohol, readily forming ...

Buffer solutions are used in industry for chemical manufacturing and ... pH, buffer solutions are very useful for chemical manufacturing and essential ...

Urea is an organic compound of carbon, nitrogen, oxygen, and hydrogen. Its chemical formula may be written as CO(NH2)2, CON2H4, or CN2H4O. It ...

Sodium (chemical symbol Na, atomic number 11) is a member of a group ... (NaK) is a heat-transfer medium and a chemical reducing agent. ...

Fluorine (chemical symbol F, atomic number 9) is a nonmetal that belongs ... attacks the remaining materials of the compound. The derivation of elemental ...

Lanthanum (chemical symbol La, atomic number 57) is a soft, silvery ... Although lanthanum belongs to a group of chemical elements called ...

Vanadium (chemical symbol V, atomic number 23) is a rare, silver-gray ... the element has beautiful, multicolored chemical compounds. ...

carbon of a hydrocarbon side chain. The chemical formula of the carboxyl ... Pyruvate is an important chemical compound in biochemistry. It is ...

Germanium (chemical symbol Ge, atomic number 32) is a lustrous, hard ... * Germanium dioxide (or germanium oxide or germania, GeO2): This compound ...

human body from other compounds through chemical reactions and thus has to ... Methionine's chemical formula is CH3-S-(CH2)2)-CH(NH2)-COOH, ...

Ethyl acetate is an organic compound that is an ester derived from the combination of ethanol and acetic acid. Its chemical formula may be written ...

Ethane is a chemical compound with the chemical formula C2H6. It is classified as an alkane, that is, an aliphatic hydrocarbon. It is the only ...

certain types of deer. In addition, this chemical has been found in the Formosan ... is the sulfur-containing aromatic compound benzothiophene. Petroleum ...

Chemical bond is the term used to describe the linkages between atoms ... Chemical bonding is categorized within five different classes of chemical ...

metals (or transition elements) are chemical elements that lie in groups ... the degree of oxidation of an atom in a compound; it is the electrical charge ...

Rhodium (chemical symbol Rh, atomic number 45) is a rare, silvery ... America. After performing a series of chemical reactions to extract platinum ...

uracil is a heterocyclic aromatic organic compound. Heterocyclic compounds ... Uracil is a planar, unsaturated compound that has the ability to absorb ...

Tin (chemical symbol Sn, atomic number 50) is a silvery, malleable ... printing process, and a niobium-tin compound is used in wires for superconducting ...

Lutetium (chemical symbol Lu, atomic number 71) is a silvery white ... A strict correlation between periodic table blocks and chemical series ...

Erbium (chemical symbol Er, atomic number 68) is a silvery metallic ... of all rare-earth metals and their chemical compounds. The principal ...

clearly see the trends in physical and chemical properties of the elements ... The noble gases are the chemical elements in group 18 (formerly group ...

Choline is a water-soluble organic compound that is classified as ... Choline is a quaternary saturated amine with the chemical formula ...

:This article is about the chemical compound. {{Chembox new ... is the most common member of a class of chemical compounds known generically ...

Osmium (chemical symbol Os, atomic number 76) is a hard, brittle, ... The compound osmium tetroxide is very toxic but has a number of important ...

Boron (chemical symbol “B,” atomic number “5”) is a chemical ... however, that boron was recognized as a chemical element by Jöns Jakob Berzelius ...

Borates are chemical compounds containing borate anions, that is, anions composed of boron and oxygen. There are various borate ions, the simplest ...

to form salt and water, promotes certain chemical reactions (e.g. A chemical ... base will increase the acidity of a compound. This concept of acidity ...

the inflorescence being in the form of a compound "umbel." The small ... feet) in its second year. The alternate compound leaves are bright green ...

classify the elements according to their chemical properties, he noticed patterns ... made a formal presentation to the Russian Chemical Society, entitled The Dependence ...

Redox (shorthand for reduction/oxidation reaction) describes all chemical ... electron acceptor. Oxidants are usually chemical substances with elements ...

of electrons. This is the result of chemical dissociation. ... #039;s cells and interferes with their chemical functions. This can lead ...

verification. Thus, although some of the chemical elements have been known ... is considered to be the first modern chemical textbook. It contained a ...

Ethylene oxide (chemical formula C2H4O) is an important industrial ... This chemical is used mostly as an intermediate in the production ...

state. Crystal polymorphs of the same compound exhibit different physical ... * performing a chemical reaction. === Applications === Artificial crystallization ...

products. Ammonia, a significant compound of nitrogen, is useful for ... later as fertilizer, and later still as a chemical feedstock. ...

When a cation forms a chemical bond ("ionic bond") with ... An ion is denoted by its chemical formula (showing the types and numbers ...

including extractions, dry cleaning and chemical waste disposal. In polymer ... than this, it remains the dominant chemical-free technology for the ...

Barium (chemical symbol Ba, atomic number 56) is a soft, silvery chemical ... fluorescent lamps, and the hydroxide, a chemical base, is used to clean up ...

in livestock feed, as an intermediate in chemical synthetic processes, and ... In the chemical industry, formic acid was long considered a compound ...

of ligands and metal ions. Originally, a chemical complex implied a reversible ... or mer. For example, in an octahedral compound with three of one ligand ...

Arsenic (chemical symbol As, atomic number 33) is a notoriously poisonous ... chemist James Marsh perfected a sensitive chemical test (the "Marsh test ...

An acid-base reaction is a chemical reaction that occurs between an ... based on his extensive works on the chemical composition of organic acids ...

soda, is a caustic metallic base. Its chemical formula is NaOH. Forming ... == Chemical properties == Sodium hydroxide is completely ionic, containing ...

of the sweet smell of the related compound benzene. It is an aromatic ... == Chemical properties== Toluene reacts as a normal aromatic hydrocarbon ...

Polonium (chemical symbol Po, atomic number 84) is a rare, extremely ... by certain microbes or by the chemical compound methylcobalamin. ...

Antimony (chemical symbol Sb, atomic number 51) is a metalloid with ... eventually to "antimonium." The chemical pioneer Jöns Jakob Berzelius ...

A nucleotide is a chemical compound comprising three components: a ... nucleotide monomers connected by covalent chemical bonds. RNA molecules may ...

Like hormones, pheromones are endogenous (internally produced) chemical ... when it comes to mating: the elephant compound is not precise enough for ...

Propylene glycol, also known by the systematic name propane-1,2-diol, is an organic compound with the chemical formula C3H8O2. Under standard ...

Drug, broadly defined, is a term used for any chemical substance that ... may have a positive connotation as a chemical compound used medically in humans ...

The chemical compound formaldehyde (also known as methanal) is a gas with a pungent smell. It is the simplest aldehyde. Its chemical formula ...

| Chemical formula | C6H5NO2 |- | Molecular mass | 123.11 g/mol ... repair. The designation vitamin B3, whose chemical formula is C5H4NCOOH (or ...

incorporation into proteins, using the chemical blueprint for the protein ... A protein is a complex, high-molecular mass organic compound comprising ...

A nonmetal is a chemical element with several properties that are opposite those of a metal. Based on their properties, the elements of the periodic ...

Distillation is a method of separating chemical substances based on ... with the invention of numerous other chemical apparatus and processes ...

Ethylene glycol (also called monoethylene glycol (MEG); 1,2-ethanediol; or ethane-1,2-diol (IUPAC name)) is a chemical compound with the formula ...

Carbon (chemical symbol C; atomic number 6) is a remarkable chemical ... The chemical symbol for carbon is C, and its atomic number (the number ...

:This article is concerned solely with chemical explosives. Other ... When a chemical compound is formed from its constituents, heat may ...

that secrete mucus. Some produce a bromide compound that gives them a medicinal smell and might protect them from bacteria and predators. Acorn worms ...

Crown ethers are heterocyclic chemical compounds that consist of a ring containing several ether groups. The most common crown ethers are oligomers ...

Hafnium (chemical symbol Hf, atomic number 72) is a lustrous, silvery ... ductile and corrosion resistant, and its chemical properties closely parallel ...

In writing down the reaction equation, in a way analogous to a chemical ... the same as proton or neutron capture. A compound nucleus may be formed, leading ...

are known for their excellent adhesion, chemical and heat resistance, good ... epoxy resin industry, was sold to Shell Chemical, now Hexion Specialty Chemicals. ...

Sapindaceae family, with large, pinnately compound evergreen leaves with five ... features large leaves that are pinnately compound, with five shiny leaflets ...

Gallium (chemical symbol Ga, atomic number 31) is a rare, soft, silvery ... Gallium is most commonly used in the form of the compound gallium ...

== Chemical composition and properties == [[Image:University of Queensland Pitch drop experiment-6-2.jpg|thumb|right|150px|The pitch drop experiment ...

composition of the mixture. Also, when a chemical process produces two or ... of Science and Technology, Department of Chemical Engineering. Retrieved January ...

Platinum (chemical symbol Pt, atomic number 78) is a silvery gray ... Platinum is a chemical element in the periodic table and is classified ...

Calcium (chemical symbol Ca, atomic number 20) is the fifth most plentiful ... This compound is widely used as an extender in paints, a filler in ...

as carrier molecules that transfer chemical groups. Coenzymes are sometimes ... low-molecular-weight, non-protein organic compound that is loosely attached ...

Dimethyl sulfoxide (DMSO) is a chemical compound with the formula (CH3)2SO. This colorless liquid is an important polar aprotic solvent that ...

Neurotransmitters are chemical compounds that relay information across ... conversion of electrical impulses to chemical transmitters, various enzyme ...

Saccharin is a synthetic organic compound that tastes hundreds of ... saccharin was eagerly received as a new chemical that diabetics and dieters ...

The solubility of a chemical substance is a physical property referring ... that can be dissolved in a solvent at chemical equilibrium. The resultant ...

usually in the form of quartz. Given its chemical inertness and considerable ... dunes merge to form 'Y'-shaped compound dunes. Many are formed in ...

not as a group need to have any specific chemical properties in common, beyond ... oils with more than 200 identified chemical substances (Dupler and Odle ...

Carbon monoxide, with the chemical formula CO, is a colorless, odorless ... ==Principal chemical reactions== ===Industrial uses=== Carbon monoxide ...

: This article is about the chemical element lithium. number=3 | symbol ... Lithium (chemical symbol Li, atomic number 3) is the lightest solid ...

An alloy is the combination of metal with other chemical elements (metallic or nonmetallic), forming a solution or chemical compound that retains ...

Photosynthesis is the conversion of the energy of sunlight into chemical ... In chemical terms, photosynthesis is an example of an oxidation-reduction ...

profound influence on the development of chemical knowledge in the West, including ... * The concept of a chemical compound; the mineral cinnabar, for example ...

Oxygen (chemical symbol O, atomic number 8) is the second most common ... other words, when it is involved in a chemical bond, it strongly attracts ...

Potassium (chemical symbol K, atomic number 19) is a member of a group ... of potassium is an important industrial chemical, and the chloride, sulfate ...

An enzyme is a biological catalyst that regulates the rate of a chemical ... Enzymes are essential to sustain life because most chemical reactions ...

in small caps in published work). Certain chemical manipulations can be performed ... is levorotatory. Rather, it says that the compound's stereochemistry is ...

Niobium or columbium (chemical symbol Nb, atomic number 41) is a rare ... *Niobium-tin (Nb3Sn): It is a metallic chemical compound of niobium ...

The chemical compound nitric oxide is a gas with formula NO. It is ... "Production: Growth is the Norm." Chemical and Engineering ...

Selenium (chemical symbol Se, atomic number 34) is a chemical element ... It is an important catalyst for chemical reactions in industry as ...

In chemistry, a carbene is a highly reactive organic compound with ... J. Kaufmann, and Gary B. Schuster, Chemical and Physical Properties ...

surface area available for adsorption and chemical reactions. It is usually ... the high surface area, though further chemical treatment often enhances ...

products, which yields the organic compound acetic acid, its key ingredient ... Acetic acid, also known as ethanoic acid, is an organic chemical compound ...

can be removed from the fruit. A nut is a compound ovary that is both the seed ... significant source of resveratrol, a chemical compound that is reported to ...

to a large variation in the physical and chemical composition of abrasives ... Cutting compound used on automotive paint is an example of an abrasive ...

Sulfur dioxide (also sulphur dioxide) is the chemical compound with the formula SO2. This important gas is the main product from the combustion ...

Thallium (chemical symbol Tl, atomic number 81) is a soft, malleable ... * Chemical element * Metal * Periodic table ==Notes== == References == ...

Helium (chemical symbol He, atomic number 2) is a minor component ... *The Encyclopedia of the Chemical Elements, edited by Cifford A. Hampel ...

Prior to the widespread use of chemical herbicides, weeds were controlled ... or one of many esters of the parent compound. These are easier to handle ...

Argon (chemical symbol Ar, atomic number 18) is a member of the noble ... argon hydrofluoride (HArF)—a metastable compound of argon with fluorine and ...

Rubidium (chemical symbol Rb, atomic number 37) is a soft, silvery ... in research and development, primarily in chemical and electronic applications. ...

Nitric acid (chemical formula HNO3) is one of the most important inorganic ... == Chemical properties == Nitric acid is formed by the reaction of ...

Ethylene (or IUPAC name ethene) is a chemical compound with the formula C2H4. Each molecule contains a double bond between the two carbon atoms ...

a way of detecting arsenous oxide (a compound of arsenic) in corpses, ... *Forensic chemistry: It is the application of chemical analyses to ...

Acetic acid, also known as ethanoic acid, is an organic chemical compound best recognized for giving vinegar its sour taste and pungent smell ...

== Chemical and physical properties == Rubber exhibits unique physical and chemical properties. ...

Mass spectrometry is an analytical technique that identifies the chemical composition of a compound or sample based on the mass-to-charge ratio ...

There are two routes that a volatile chemical can take to reach the ... *Orthonasal route. The chemical is carried in the air to the external ...

chemistry) is the study of chemicals and chemical processes that occur in ... is a continuity of both chemicals and chemical principles that operate ...

of moderate androgenic activity. This compound crosses the basal membrane ... anti-thrombin III, and plasminogen. These chemical factors play a role in the ...

caused by overexposure to pesticides and chemical warfare agents such as sarin ... as tabasco peppers and habaneros. The compound is not appreciably toxic ...

free or united at the base. Flowers with compound pistils composed of three ... Buckwheat contains rutin, a medicinal chemical that strengthens capillary ...

from natural products or prepared by chemical synthesis. ... *a chemical (typically a solvent) can be sprayed along with the paint ...

Yttrium (chemical symbol Y, atomic number 39) is a lustrous, silvery ... substance is the most important yttrium compound. It is especially useful ...

*Chemical substance, in chemistry, a substance is an element or compound ... *Substance (medicine), in medicine, substance is any drug, chemical ...

Sodium chloride, also known as common salt or table salt, is a chemical compound with the formula NaCl. Its mineral form is called halite. It ...

bacteria; and coal converted through a chemical process. ... or explosion occurs. Sometimes a related compound, thiophane is used, with ...

human body from other compounds through chemical reactions and thus has to ... Tyrptophan's chemical formula is C11H12N2O2. Tryptophan behaves ...

and domestic. It includes physical, chemical and biological processes ... WWTP). The order and types of mechanical, chemical and biological systems that ...

is a group of organic compounds. Its chemical formula is C6H6. If inhaled ... (calcium oxide). Mitscherlich named the compound benzin. In 1845, Charles ...

seen, but can be detected in the form of chemical signals; these are known ... such as those of fossil ferns, involve chemical reduction of the complex ...

Zirconium (chemical symbol Zr, atomic number 40) is a strong, lustrous ... process. It is the principal starting compound for the synthesis of many ...

natural processes (such as composting) or chemical processes (such as the Haber ... saw innovative competition from Imperial Chemical Industries who developed ...

is replaced by metal atoms, the resultant compound is called a fulleride. Some ... high resistance to heat, and relative chemical inactivity (as it is cylindrical ...

A prominent example of an intercalation compound is potassium graphite, denoted by the formula KC8. Natural and crystalline graphites are not ...

atoms attached to biphenyl and a general chemical formula of C12H10-xClx. ... ==Physical and chemical properties== Most of the 209 different PCB ...

Radon (chemical symbol Rn, atomic number 86) is a chemically inert ... Category:Chemical elements 70471850 ...

which produced a beautiful white compound and appeared to take away ... the help of his wife and children. His compound at this time consisted of ...

The chemical compound ammonium nitrate, the nitrate of ammonia with the chemical formula NH4NO3, is a white powder at room temperature and standard ...

and subgenus Rubus (or Eubatus) with compound leaves and bearing aggregate ... the ground and bearing large palmately compound leaves with five or seven ...

the mid-infrared absorption spectrum of a compound is very specific for that ... Being very energetic, UV can break chemical bonds, making molecules ...

Mercury, also called quicksilver (chemical symbol Hg, atomic number ... scientific apparatus. The organomercury compound Thiomersal (commonly called ...

mental phenomena originated from physico-chemical processes in the human body ... of Descartes that the human being is a compound of two different but interactive ...

Processing techniques include various chemical, thermal, electrolitic, ... Some of the chemical processes will require a source of hydrogen for ...

Deuterium (chemical symbol D or ²H) is a stable isotope of hydrogen ... a nonradioactive isotopic tracer to study chemical reactions and metabolic ...

or alkyl halides) are a group of chemical compounds, consisting of ... halogenoalkane, and alkyl halide is a chemical compound derived from an alkane ...

Felting is done by a chemical process in industry. It is also done ... with a dilute solution of the mercury compound mercuric nitrate. The skins ...

number of legs. In fact, its name is a compound word formed from the Latin ... As far as humans are concerned, this chemical brew is fairly harmless ...

out and reduced back to the dihydroxy compound using hydrogen gas in the ... that doesn't react or catalyse the chemical. Numerous materials and ...

world. They are bulbous plants that produce chemical compounds (mostly cystein sulfoxide) that give them a characteristic onion or garlic taste and ...

are Type I, while almost all impure and compound superconductors are Type II. ... at 93 K in a New Mixed-Phase Y-Ba-Cu-O Compound System at Ambient Pressure ...

is a strong mineral acid with the chemical formula H2SO4. It is soluble ... in greater amounts than any other chemical besides water. World production ...

Phosphorus (chemical symbol P, atomic number 15) is a multivalent ... to the recent US Navy's Treatment of Chemical Agent Casualties and Conventional ...

A polymer (from the Greek words polys, meaning "many," and meros, meaning "parts") is a chemical compound consisting of large ...

Development of chemical pigments and dyes helped bring new industrial ... *Vermilion, a toxic mercury compound favored for its deep red-orange ...

Ammonia is a chemical compound of nitrogen and hydrogen, with the formula NH3. It is a gas at standard temperature and pressure In this case, ...

:This article is about the chemical element. number=16 | symbol=S ... Sulfur or sulphur (see spelling below) (chemical symbol S, atomic ...

Uranium (chemical symbol U, atomic number 92) is a silvery metallic ... from its ore.Seaborg, Encyclopedia of the Chemical Elements (1968), 774 Uranium ...

and understanding of this essential compound has allowed supplementation ... group of some enzymes. This activated compound plays a vital role as the ...

other hand, washing powder is an example of the chemical process industry. The production of dehydrated natural flavors and essences is very important ...

50° F (UGA 2007). The flowers are a compound umbel, composed of small ... as they go through menopause, as it has a chemical that inhibits the activity ...

such fundamental issues as the nature of chemical elements and their composition ... papers," and prepare some important chemical investigations that he proposed ...

Gold (chemical symbol Au; atomic number 79) has long been valued as ... 金 [jīn], Japanese 金 [kin]) is a chemical element and a precious metal ...

of a human being, a collection of chemical elements, mobile electrons ... The most common chemical compound in the human body is water, with ...

Titanium (chemical symbol Ti, atomic number 22) is a silvery-white ... of household plastics. In nature, this compound is found in the minerals ...

oxide or dinitrogen monoxide, is a chemical compound with the formula N2O. ... Based on its properties, this chemical has diverse applications. For ...

Compound eyes are found among certain arthropods and are composed ... Trilobites, which are now extinct, had unique compound eyes. They ...

Silver (chemical symbol Ag, atomic number 47) is a soft metal with ... with Old High German silabar). Its chemical symbol, Ag, is an abbreviation ...

and grown as ground cover. The chemical that makes ivy leaves and ... usually bear pinnately or palmately compound leaves, and usually have ...

ribonucleic acid (mRNA), encoding a chemical "blueprint" for ... (an RNA molecule that catalyzes a chemical reaction). Such evidence ...

Zinc (chemical symbol Zn, atomic number 30) is a bluish-white metal ... Given the low boiling point and high chemical reactivity of this metal ...

A detergent is a chemical compound or mixture of compounds used as a cleaning agent. A soap is a cleaning agent that is composed of one or more ...

acids found in wine. A solution of this compound derived from living things ... crystals by hand gave two forms of the compound: Solutions of one form rotated ...

post-process removal due to their chemical activity, which would eventually ... closely to a Sn3Pb intermetallic compound. In plumbing, a higher proportion ...

Carbon dioxide is a chemical compound that is found as a gas in the Earth's atmosphere. It consists of simple molecules, each of which has ...

used PET scanning isotope carrier. The compound was first administered to ... used to trace the biologic pathway of any compound in living humans (and many ...

The chemical composition of the aerosol directly affects how it interacts with solar radiation. The chemical constituents within the aerosol ...

of human consciousness in the same way that a chemical compound is broken into various elements. It also rivaled the Behaviorism of Ivan Pavlov, John ...

Technetium (chemical symbol Tc, atomic number 43) is a silvery gray ... technetium-99, becomes feasible. Several chemical extraction processes are ...

receive input. A dendrite may receive chemical signals from the axon termini ... they communicate with other cells via chemical or electric impulses across ...

important parts. Ant eyes include the compound eyes, similar to fly eyes: ... in direct contact with the ground, these chemical messages are more developed ...

, in particular inside soot obtained by chemical exfoliation. There have ... in a solution of pure hydrazine (a chemical compound of nitrogen and hydrogen ...

Chemical analysis and synthesis go no farther than to the separation ... summarizing (Dalton, A New System of Chemical Philosophy): ...

of human consciousness like the elements of a chemical compound, and to the Behaviorism of Ivan Pavlov, John B. Watson, and B. F. Skinner, providing an ...

from the blood. The liver processes chemical waste products and other ... is the secretion of bile, an alkaline compound that aids in the digestion ...

the smaller statue using an organic silicon compound. [https://web.archive.org/web/20110305032019/http://www.aolnews.com/2011/03/01/researchers ...

et al. 2006). A hormone is a secreted chemical messenger that coordinates ... Zysline et al. 2006). Testosterone's chemical formula is C19H28O2. ...

life, one can view organisms are complex chemical reactions, organized in ... Organisms are complex systems of chemical compounds which, through ...

Semiconductors may be elemental materials, such as silicon, compound ... for mass production. The level of chemical purity needed is extremely ...

requirements of medical, pharmacology, chemical and industrial applications ... kind of treatment, if any, is needed. Chemical analysis, while expensive ...

acid that appears as a white, crystalline compound. Structurally, it is related ... scurvy, even though the underlying compound responsible for their effectiveness ...

also occurs in the systematic name of many chemical compounds, such as "hexamethyl" Sex- is a Latin prefix meaning "six." Thus: ...

sediment. The organic matter then underwent chemical changes—through the action of heat and pressure or the action of anaerobic bacteria—to form a ...

on the position of pigments in the compound eyes of certain beetles ... * Frisch, Karl von. 1984. Bees: Their Vision, Chemical Senses and ...

* chemical reaction == Crystalline materials == classes of materials, with all types of chemical bonds. Almost all metals ...

coined in 1865 from the word gas and the chemical suffix -ine/-ene. The modern ... of this word. The usage derives from the chemical benzene, not from Bertha ...

Water is a chemical compound with the chemical formula H2O. Each molecule ... specific heat capacity of any known chemical compound, after ammonia. In ...

occurs when one organism exudes a chemical compound as part of its normal ... produces the penicillin antibiotic, a chemical that kills bacteria. A second ...

Salts are formed by a chemical reaction between: * A base and an acid ... The manufacture and use of salt is one of the oldest chemical industries. ...

He made numerous experiments on different chemical processes that ... * On the Aberration of Compound Lenses and Object-Glasses (1821) ...

It includes processes to remove physical, chemical and biological contaminants ... WWTP). The order and types of mechanical, chemical and biological systems that ...

(i.e., a cell, tissue, or organ that excretes a chemical substance). One of its important glandular functions is the secretion of bile, an alkaline ...

Aluminum (or aluminium) (chemical symbol Al, atomic number is 13) ... of the "poor metal" group of chemical elements. ...

problems, such as the release of chemical pollutants during manufacture ... After the First World War, improvements in chemical technology led ...

at the base of the urinary bladder. It is a compound tubuloalveolar gland (start out as branched tubular, tube-shaped, and branches further to terminate ...

Caffeine is a chemical compound that is made by plants. Caffeine is ... a much poorer ability to metabolize this compound. Caffeine has a much more ...

formed mostly of calcium phosphate in the chemical arrangement termed calcium ... *A compound fracture occurs when the edges of a broken bone punctures ...

workshops and ordinary habitations. The compound was surrounded by a thick ... Indeed, the marble itself has suffered chemical change and the surviving ...

of desserts and perfumes. The primary compound responsible for its characteristic ... The compound vanillin (4-hydroxy-3-methoxybenzaldehyde) is the primary ...

consider “water” to be a pure physical chemical compound. Water carried a sense of mystery and divinity. To put it another way, Thales conceived of ...

Ethanol, also known as ethyl alcohol, drinking alcohol, or grain alcohol, is a flammable, colorless, slightly toxic chemical compound with a ...

A research group published a 1996 report on a chemical extracted from Spirulina platensis, a species of blue-green algae, which inhibited Mumps ...

including testing of biological and chemical weapons on human populations ... of a research group in Manchukuo for chemical and biological experimentation. ...

in its mechanical characteristics and its chemical composition. The distinction ... ! width="14%" | Compound ! width="12%" | Amount ...

is also the raw material for many chemical products, including solvents ... The chemical structure of petroleum is composed of hydrocarbon chains ...

he investigated the relationship between the chemical composition and the optical properties of various glasses, with reference to the conditions ...

control unit. An igniter starts a rapid chemical reaction generating primarily ... present initially. In small amounts this chemical can cause minor irritation ...

Nutritionists are seeking to know which chemical components of food supply ... The human body is made up of chemical compounds such as water, amino ...

population dynamics and development of chemical and biological control measures ... the adults somewhat, as they have compound eyes, developed legs and ...

When used as a compound adjective, the term is typically hyphenated ... by both the geometrical structure and the chemical composition, and follow ...

be caused by using pesticides and other chemical sprays indoors without proper ... Category:Chemical engineering 228815003 ...

quot; is that it is a Middle Persian compound of Bag "god" ... Iraq had not abandoned its nuclear and chemical weapons development program ...

of three. The number of carpels in a compound pistil may be only two, ... The latter flower types, which have chemical barriers to their own pollen ...

Copper(II) carbonate is green. This compound produces the unique appearance ... Category:Chemical elements 65627566 ...

or ubiquinol (Wang and Quinn 1999). The compound α-tocopherol is a common ... was determined. Evans also found that the compound reacted like an alcohol ...

family compounds surround a village center. Each compound consists of mud huts enclosed by a fence of dried palm fronds or reeds. Married sons and their ...

of aluminum with steel in ship hulls or compound plates. Other solid-state ... The hardenability of steel depends on its chemical composition, with greater ...

caused by a bacterial infection or direct chemical insult. Direct aspiration ... body's production of leukotrienes, a compound that contributes to the ...

The Greeks called them krokodilos, a compound word from kroke, which means ... can do more than that, like assisting in chemical reception or even salinity ...

contains aristolochic acid, a carcinogenic compound. Ginger is one ... Ginger is also a minor chemical irritant, and because of this was ...

life can be totally explained by physico-chemical processes alone. ... ==Physical and chemical properties== [[Image:DNA chemical structure ...

The establishment of heavy and chemical industries in its vicinity ... runs a large number of detergent and chemical industrial units, has its ...

ammonia and ammonite. Ammonia, as a chemical compound, was given its name by Swedish chemist Torbern Bergman in 1782. He chose "ammonia ...

transistor, the basis of future chemical processors. *Trigate transistors ... high performance versions now employ the compound semiconductor material gallium ...

to this first pair, mature nodes form compound leaves with three blades. Mature trifoliolate leaves, having three to four leaflets per leaf, ...

#039;s Square. If no pope is elected yet, a chemical compound is added to the fire to produce black smoke. When a vote is successful, the ballots are ...

* Sodium fluoride (NaF), the first compound used, is the reference ... and monitoring equipment, the fluoride chemical and its transportation and ...

refining, textile production, and chemical processing. Agriculture ... areas, an extended family may live in one compound or house shared by the sons ...

*Lords and nobles of the court could wear clothes of compound colors ... industry, electric weaving looms and new chemical dyeing techniques transformed ...

resistance caused by overuse of chemical agents and the high mutation ... TCM practitioners use to determine which compound to prescribe. For their ...

*Oxidizer : The amount of chemical oxidizer in gum bound incense must ... was known to Jews in ancient times that a compound of aromatic gums and balsams ...

and converted by photosynthesis into chemical energy that can be used ... are broadly classified into: thermal, chemical, and biochemical methods ...

its death, when artificially induced by chemical, surgical, or other means ... in France developed mifepristone, a chemical compound which works as an abortifacient ...

that all disease was the outcome of chemical processes, and that acidic ... cells, laid rest the humor-theories about chemical imbalances in the body. ...

and tars, which impart undesirable resinous and chemical flavors. If these woods are used, they should be burned in a catalytic grill, such as a rocket ...

II in 1864. Ictineos engine used a chemical mix containing a peroxide ... a variety of detection systems, including chemical sensors to "smell" ...

about the thermodynamic properties of the compound thiotimoline." After ... *1965 James T. Grady Award of the American Chemical Society ...

weaponry, textiles, sugar, cement, and chemical products, is based in Tehran ... personnel were killed when Iraq used chemical weapons. The total Iranian ...

of human consciousness in the same way that a chemical compound is broken into various elements. It also offered an alternative to the approach of Sigmund ...

. A siheyuan consists of a square housing compound, with rooms enclosing a ... *Beijing University of Chemical Technology (北京化工大学) ...

Picket"), colored marker, chemical, nuclear devices; high explosive ... quot; another. The latter was a compound of guncotton and nitro-glycerine ...