Li2O (+1; -2)
Na2O (+1; -2)
K2O (+1; -2)
CuO (+2; -2)
Ag2O (+1; -2)
MgO (+2; -2)
CaO (+2; -2)
SrO (+2; -2)
Li2O (+1; -2)
Na2O (+1; -2)
K2O (+1; -2)
CuO (+2; -2)
Ag2O (+1; -2)
MgO (+2; -2)
CaO (+2; -2)
SrO (+2; -2)