Question

What is the formula for barium oxide?

Answer 1

`BaO`

Explanation:

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

So Barium on getting oxidized forms the ionic compound is `BaO` ( Barium Oxide )

`Ba^(2+) + O^(2-) rarr BaO`

Answer 2

`BaO`

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, `BaO`.