Укажите валентности ZnO, BeO, PbO, SnO, AI2O3, Cr203, Fe203, V205

Question

Укажите валентности ZnO, BeO, PbO, SnO, AI2O3, Cr203, Fe203, V205

Answer 1

ZnO (+2; -2)

BeO (+2; -2)

PbO (+2; -2)

SnO (+2; -2)

Al2O3 (+3; -2)

Cr2O3 (+3; -2)

Fe2O3 (+3; -2)

V2O5 (+5; -2)