Question

Electronic configuration of magnessium

Answer 1

Answer:

[Ne] 3$s^{2}$

Explanation:

You can alternatively write it as 1$s^{2}$2$s^{2}$ 2$p^{6}$3$s^{2}$, but since noble gasses like neon are stable, we simply write their letter and then the configuration that goes after them.