# How do you write the formula for magnesium oxide?

Jan 22, 2016

$M g O$

#### Explanation:

This is so since magnesium is in group 2 on the periodic table so has valency of 2+ and oxygen is in group 6 so has valency of 2-.
The overall net charge is hence zero for the molecule do it is balanced and we have 1 magnesium atom and 1 oxygen atom forming the ionic bond in this case.