However, it's important to note that there are different types of iron oxides, each with a different ratio of iron to oxygen:

* Ferrous oxide (FeO): One iron atom for every one oxygen atom.

* Ferric oxide (Fe₂O₃): Two iron atoms for every three oxygen atoms.

* Magnetite (Fe₃O₄): Three iron atoms for every four oxygen atoms.

These different iron oxides have different properties and uses. For example, rust is primarily ferric oxide, while magnetite is a magnetic mineral.