Iron and oxygen.
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Iron oxide contains iron (Fe) and oxygen (O) elements. The most common forms of iron oxide are magnetite (Fe3O4) and hematite (Fe2O3).
Iron oxide is not an element, but a chemical compound made of iron and oxygen. Iron is the element, while iron oxide is the compound resulting from the combination of iron and oxygen atoms.
The element in ferrous oxide is iron. Ferrous oxide contains iron in the +2 oxidation state.
The chemical formula Fe2O3 is for the chemical compound known as Iron(III) oxide. Its melting point is 2,851 degrees Fahrenheit.
Iron oxide is not a single element, but rather a compound composed of iron and oxygen atoms.
We know that iron (Fe) and oxygen (O) make up iron oxide. (There is more than one oxide of iron, by the way.)