Inner transition element

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Comment by Nasira on June 7th, 2014 at 12:40 pm

Nice informatio,which is very useful for students

Comment by Tanja on February 24th, 2015 at 7:01 pm

I had a student ask what group numbers were given to the inner transitions and I can’t seem to find an answer! Please help.

Comment by Jennifer Tanabe on February 25th, 2015 at 11:28 am

Thank you, Tanja, for your feedback. In answer to your question, the inner transition elements don’t have group numbers! They are located between Groups 3 and 4, and belong in Periods 6 and 7. They are known as the Lanthanoids (formerly Lanthanides) and Actinoids (formerly Actinides) due to their placement immediately following Lanthanum and Actinium respectively.

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