Fe3O4 is called as " Iron(II)(III) oxide. What is the meaning of this

1.	Fe3O4 is called as " Iron(II)(III) oxide. What is the meaning of this II & III
Answer» ít íѕ вαѕєd upσn thє nσ σf vαlєncч thєч hαvє Valency It is the name given by IUPAC (International Union of Pure and Applied Chemistry ).It is so called because it is formed by the reaction between ferrous oxide and ferric oxide i.e.,Iron(II) and (III) oxide [ feo+fe2o3]

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