# What is the ionic formula for lithium oxide?

##### 1 Answer
Feb 2, 2014

The ionic formula for Lithium Oxide is $L {i}_{2} O$.

Lithium is an Alkali Metal in the first column of the periodic table. This means that lithium has 1 valence electron it readily gives away in order to seek the stability of the octet. This makes lithium a $L {i}^{+ 1}$ cation.?

Oxygen is in the 16th column or ${p}^{4}$ group.
Oxygen has 6 valence electrons. It needs two electrons to make it stable at 8 electrons in its valence shells. This makes oxygen a ${O}^{- 2}$ anion.

Ionic bonds form when the charges between the metal cation and non-metal anion are equal and opposite. This means that two $L {i}^{+ 2}$ cations will balance with one ${O}^{- 2}$ anions.

This makes the formula for lithium oxide $L {i}_{2} O$

I hope this is helpful.
SMARTERTEACHER