What is the correct name for the ionic compound, FeO?

Question

? ferric oxide
? iron(III) oxide
? iron(II) monoxide
? iron(II) oxide
? iron(I) oxide

Answer 1

The correct name for the ionic compound FeO is iron(II) oxide.

In this compound, iron (Fe) has a oxidation state of +2, which is indicated by the (II) in the name, and the oxide (O) has a -2 charge. Therefore, the proper naming is iron(II) oxide.