4Al + 3O₂ = 2Al₂O₃
2Mg + O₂ = 2MgO
2H₂ + O₂ = 2H₂O
2Zn + O₂ = 2ZnO
4P + 5O₂ = 2P₂O₅
2S + 3O₂ = 2SO₃
2Ca + O₂ = 2CaO
4Fe + 3O₂ = 2Fe₂O₃