Whenever water or air is around iron for a while it can rust because the iron bonds to the oxygen forming iron oxide.
iron oxide
Iron(II) oxide is Fe(OH)2 Iron(III) oxide is Fe(OH)3
The formula for iron (II) oxide is FeO. It is a black colored powder, not rust.
I am going to assume you meant ferrous oxide. Ferrous oxide is also known as Iron(II) oxide and has the formula unit FeO. The oxidation number of iron in iron(II) oxide is +2.
Whenever water or air is around iron for a while it can rust because the iron bonds to the oxygen forming iron oxide.
iron oxide
No elements are made up of a compound. I think you mean 'Which elements make up iron oxide?', and the answer to that is iron and oxygen.
I am going to assume you meant ferrous oxide. Ferrous oxide is also known as Iron(II) oxide and has the formula unit FeO. The oxidation number of iron in iron(II) oxide is +2.
Iron(II) oxide is Fe(OH)2 Iron(III) oxide is Fe(OH)3
The formula for iron (II) oxide is FeO. It is a black colored powder, not rust.
I am going to assume you meant ferrous oxide. Ferrous oxide is also known as Iron(II) oxide and has the formula unit FeO. The oxidation number of iron in iron(II) oxide is +2.
Iron and oxygen
Iron (II) oxide.FeO=====( older name still in use; ferrous oxide )
There are a umber of different oxides of iron. It depends of the oxidation state of iron. Hematite is Fe2O3, iron(III) oxide. Magnetite is Fe3O4 (diron(II) diron(III) oxide. There is also FeO, iron(II) oxide.
Basically there are 2 forms of iron:iron 2+ and iron 3+ Iron 2 oxide, basically is Fe2+ in order to stabilize it you need 2- which is exactly one oxygen ion therefore we get FeO While iron 3 oxide is Fe3+ in order to make a stable compound we need 2 Fe 3+ along with 3 O 2- which gives us +6 and -6 therefore a stable compound which is Fe2O3 the hydrated form of iron 3 oxide is rust
Ferrous Oxide or Iron 2 oxide