2Na + Cl2 -> 2NaCl - натрий, хлор, хлорид натрия - Na - 0 Сl - 0 Na+1Cl-1
2Al+ 3Cl2 -> 2AlCl3 - хлорид алюминия, Al- 0 Cl - 0, Al+3Cl-1
2FeCl2 + Cl2 -> 2FeCl3 - Fe+2Cl-1, Cl - 0, Fe+3Cl-1
2C3H6 + 9O2 -> 6CO2 + 6H2O - C-2H+1 O2 - 0 C+4O-2, H+1O-2
2Cu + O2 -> 2CuO - Cu - 0 O - 0 Cu+2O-2
2Fe(OH)3 -> Fe2O3 + 3H2O - Fe+3O-2H+1 -> Fe+3O-2 + H+1O-2
2Al + 3CuBr2 -> 2AlBr3 + 3Cu - Al - 0, Cu+2Br-1 -> Al+3Br-1 + Cu - 0
3Ca(OH)2 + 2Na3PO4 -> Ca3(PO4)2 + 6NaOH - Ca+2O-2H+1 + Na+1P+5O-2 -> Ca+2P+5+O-2 + Na+1O-2H+1
K2O + H2O -> 2KOH - K+1O-2 + H+1O-2 -> K+1O-2H+1
2NO2 -> 2NO+ O2 - N+4O-2 -> N+2O-2 + O - 0