Ca + H2SO4(разб) = CaSO4 + H2
4Ca + 5H2SO4(конц) = 4CaSO4 + H2S + 4H2O
Zn + Cl2 = ZnCl2
Mg + H2O = MgO + H2
Mg + 2HCl = MgCl2 + H2
Ag + H2O - реакция не идет
Mg + 2AgNO3 = Mg(NO3)2 + 2Ag
2Fe + 3Cl2 = 2FeCl3
2Al + 3S = Al2S3
2Al + 6HCl = 2AlCl3 + 3H2
2Na + 2H2O = 2NaOH + H2