Предмет: Химия, автор: ryclan123456789

1. Определите валентность химических элементов по формулам соединений:H2S; CuO; Fe2O3; SiO2; Na3P; BaH2

Ответы

Автор ответа: ЗолотаяМышь

H2S - H+1, S-2
CuO - Cu+2, O-2
Fe2O3 - Fe+3, O-2
SiO2 - Si+4, O-2
Na3P - Na+1, P-3
BaH2 - Ba+2, H-1

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