Fe (II) si SO4 (II) => FeSO4
H (I) si CO3 (II) => H2CO3
Al(III) si SO4 (II) => Al2(SO4)3
Al(III) si S(II) => Al2S3
Mg (II) si O(II) => MgO
K(I) si SO4(II) => K2SO4
Cu(II) si NO2 (I) -> Cu(NO2)2
P(III) si O(II) => P2O3 sau P(V) si O(II) => P2O5
Ca(II) si NO3(I) => Ca(NO3)2
Ca(II) si OH(I) => Ca(OH)2
H(1) si PO4(III) => H3PO4
H(I) si O(II) => H2O
N(II) si O(II) => NO sau N(III) si O(II) => N2O3
Zn(II) si CO3 (II) => ZnCO3
Pb(IV) si O(II) => Pb2O4 = PbO2
C(IV) si O(II) => C2O4 => CO2