Answer:- Fe^2+ makes Mg go from 0 to 2+, Fe^2+ is the oxidizing, Mg makes Fe^2+ go from 2+ to 0, Mg is the reducing.
Fe^2+ is a chemical sign for ferrous in chemistry. Ferrous mentions to iron with oxidation number of +2, denoted iron (II) or Fe2+.
Mg is a chemical symbol for Magnesium in chemistry.
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