Question

Based on its position in the periodic table of the elements, how many valence electrons does magnesium (atomic number 12) have?

Answer 1

2 e'

Step-by-step explanation:

An element in Group 2 has two valence electrons.

Also, the electron configuration of Mg is 1s² 2s²2p⁶ 3s² or [Ne]3s². Since the 3s² electrons are the outermost electrons, magnesium has two valence electrons.