# What is the number of valence electrons in magnesium?

Oct 13, 2016

Magnesium has 2 valance electrons.

#### Explanation:

The electron configuration of Magnesium is $1 {s}^{2} 2 {s}^{2} {p}^{6} 3 {s}^{2}$

The $1 {s}^{2} 2 {s}^{2} 2 {p}^{6}$ is the electron configuration of Neon $N {e}_{10}$

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

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