# What is the formula for barium oxide?

Apr 21, 2018

$B a O$

#### Explanation:

Barium cation has $+ 2$ charge and oxide anion has $- 2$ charge .

So Barium on getting oxidized forms the ionic compound is $B a O$ ( Barium Oxide )

$B {a}^{2 +} + {O}^{2 -} \rightarrow B a O$

Apr 21, 2018

$B a O$

#### Explanation:

Barium oxide is an ionic compound, compromised of a barium metal cation, and an oxygen non-metal anion. Looking at the periodic table, oxygen is in group $6$ or $16$, and will therefore have an oxidation number of $- 2$, while barium sits in group $2$, and will have an oxidation number of $+ 2$.

So, one ion of barium neutralizes one ion of oxygen, and so those two combine to form barium oxide, $B a O$.