What is the oxidation number for iron?

The total number of electrons that an atom either gains or loses in order to form a chemical bond with another atom is said to be an oxidation number of an atom. The iron ion Fe 3+ has an oxidation number of +3 because it can acquire three electrons to form a chemical bond. The oxidation number of the element Fe is 0. The most common oxidation numbers of Fe are +2, in FeCl 2 , and +3 in FeCl 3

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