what is the name of the ionic compound cao?\ncalcium oxygen\ncalcium oxide\ncalcium(i) oxide\ncalcium(ii)…

Answer:

B. calcium oxide

Brief Explanations:

In naming ionic compounds, the metal (calcium) is named first, followed by the non - metal with its ending changed to - ide. Calcium has a fixed +2 charge and doesn't require Roman numerals in its name in simple ionic compounds like CaO. So the name is calcium oxide.