🤓 Based on our data, we think this question is relevant for Professor Anglin's class at ARIZONA.
CaO or calcium oxide is composed of Ca2+ and O2-. Recall that for compounds, charge of the ion goes to the subscript of the counterion.
We can determine if CaO is ionic or covalent by analyzing Ca and O
Predict whether CaO is ionic or covalent, based on the location of their constituent atoms in the periodic table.