Here's why:

* Fe represents the element iron.

* O represents the element oxygen.

* The subscript 2 indicates that there are two oxygen atoms in the compound.

The Roman numeral (IV) indicates the oxidation state of the iron atom, which is +4 in this case.

It's important to note that iron(IV) oxide is not a stable compound under normal conditions. It's a highly reactive oxide that quickly decomposes.