Question

Why we write compound name fe3O4 if the valency of fe is 4 and O is
2

Answer 1

Fe is a transition elements and has two valencies +2 and +3 when valency is 3 it forms Fe3O4 ((iron 2,3 oxide))

Answer 2

Answer: Well, it is your misunderstanding that iron has a valency of 4.

We write Fe3O4 because 2 different compounds are formed.

Explanation:

These compounds are Fe2O3 and FeO.

That is:

3Fe+ 4H2O ---> Fe2O3 + FeO+ 4H2

Namely, ferrous and ferric oxides.

Please mark my answer as the brainiest.