ZnO (+2; -2)
BeO (+2; -2)
PbO (+2; -2)
SnO (+2; -2)
Al2O3 (+3; -2)
Cr2O3 (+3; -2)
Fe2O3 (+3; -2)
V2O5 (+5; -2)
ZnO (+2; -2)
BeO (+2; -2)
PbO (+2; -2)
SnO (+2; -2)
Al2O3 (+3; -2)
Cr2O3 (+3; -2)
Fe2O3 (+3; -2)
V2O5 (+5; -2)