number of valence electrons in an atom of Chlorine?

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Answer 1 · 2018-02-03T12:24:21

#7#

Chlorine's electron configuration is #[Ne]3s^2\3p^5#.

So, it has #3# electron shells, and the outermost shell has #2+5=7# valence electrons.

Anyways, it is in the halogen group (Group #7#), so it has #7# valence electrons.

When it becomes an ion, chlorine wants another electron, and becomes #(Cl^-)#.

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