Question

How many valence electrons do a magnesium atom and a chlorine atom have?

Magnesium has one valence electron and Chlorine has seven

Magnesium has one valence electron and Chlorine has seventeen.

Magnesium has two valence electron and Chlorine has seven

Magnesium has two valence electron and Chlorine has eight

Answer 1

The correct statement is: **Magnesium has two valence electrons and Chlorine has seven.**

- Magnesium (Mg), which is in Group 2 of the periodic table, has 2 valence electrons.
- Chlorine (Cl), which is in Group 17 (or Group 7A), has 7 valence electrons.