What is the oxidation number of iron oxide?

Answer 1

As a transition metal , iron exhibits several oxidation numbers.

As FeO (Ferrous Oxide) its oxidation no,. is ;2; usuallu written as 'Iron(II)Oxide'. This is pale green in colour

As F2O3(Ferric Oxide) its oxidation No. is '3' usually written as Iron(III)Oxide. This in (Rust) Brown/Red in colour. Gives human blood its red colour.

NB Note the Roman Numerals to indicate oxidation state.

NNB Iron has six(6) electrons in its outer(valence) 'd' electron shell. The oxidation numbers indicates that only '2' or '3' as the case may be, electrons are involved in combining with another atom. The other electrons remain uncombined.

Answer 2

There is no specific rule for the oxidation number for iron II. Iron II is not an alkali metal (+1), an alkali earth metal (+2), Aluminum (+3), a Halogen (-1), Hydrogen (+1 with nonmetals), or Oxygen (-2). It simply depends on the compound it is present in.

Ex: If we have FeO, Oxygen automatically has a charge of -2, so we can deduce that Fe has a charge of +2. However, if we have, hypothetically, a compound of FeO2, Fe would have to have a charge of +4 because of the 2 Oxygen atoms present per molecule.

My answer would be that most of the time its charge would be +2 simply because that's its charge as a cation. However, that is not always the case.

Answer 3

-2 for oxygen. The oxidation number of iron depends on the oxide.

+2 for Fe in FeO.

+3 for Fe in Fe2O3.

+2 and +3 for Fe in Fe3O4. (Note: Fe3O4 can be considered as a mixture of FeO and Fe2O3)

Answer 4

In iron oxide (Fe3O4), the oxidation number of iron is +2 and +3. Two iron atoms have an oxidation state of +3, while one iron atom has an oxidation state of +2.

Answer 5

3+

Answer 6

2+