2Zn + O2 = 2ZnO 2Al + 3Cl2 = 2AlCl3 6Li + N2 = 2Li3N Mg + S = MgS 3Ba + N2 = Ba3N2 2Cu + O2 = 2CuO 2K + F2 = 2KF Mg + Br2 = MgBr2