# What is the oxidation number for iron?

Jan 5, 2017

The oxidation number of the element $\text{Fe}$ is 0.
However, the oxidation number of $\text{Fe}$ in its compounds can take different values.
The most common oxidation numbers of $\text{Fe}$ are +2, as in ${\text{FeCl}}_{2}$, and +3, as in ${\text{FeCl}}_{3}$.