any pictures of atomic orbital model for IRON?
No, elemental iron is Fe. But iron (III) oxide is Fe2O3, not FeO3! So the equation so far should be: Fe + O2 --- Fe2O3 But then you have to balance the equation so that there's the same number of irons and oxygens on each side. So you have: 4 Fe + 3 O2 --- 2 Fe2O3
