What is the number of valence electrons in magnesium?

1 Answer
David Drayer
Oct 13, 2016

Magnesium has 2 valance electrons.

Explanation:

The electron configuration of Magnesium is #1s^2 2s^2p^6 3s^2#

The #1s^2 2s^2 2p^6# is the electron configuration of Neon #Ne_10#

This first 10 electrons are in a stable configuration leaving only 2 valance electrons. the # 3s^2# electrons.

So the charge on Magnesium as an ion is usually +2 wen it loses the two # 3s^2# electrons.

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