Which ion has the most shells that contain electrons??

1 Answer
Anirudh E.
Mar 1, 2018

See below.

Explanation:

Any anion (negatively charged) in the 7th period (row) of the periodic table. The last row of the periodic table contains elements that have 7 electron shells. This is the most of any ion that can be formed from the periodic table of the elements.

The reason that certain cations wouldn't work is, for example, Fr+. Technically, the Fr atom would have 7 electron shells with electrons in it, but Fr+ would have only 6 electron shells which are filled (since it would have the electron configuration of Rn, which is a period 6 element (with 6p6 ending electron configuration)).

To answer your question, Fr− would work just fine.

I hope that helps!

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