Question

What is the oxidation number of manganese in `"Mn"_2"O"_3` ?

Answer 1

`+3`

Explanation:

In oxides of elements, oxygen atoms normally have `( -2)` as the value.of the oxidation state.

That means `(-6)` charge comes from `3` oxygen atoms. Since `"Mn"_2"O"_3` is a neutral compound, each `"Mn"` atom should have `(+3)` oxidation value to balance the charge from the oxygen atoms.