Question

Найди валентность элементов:

HCI, SO2, CuO, CI207, N2O5, CH4, H2S.

Answer 1

HCl - H(I), Cl(I);

SO2 - S(IV), O(II);

CuO - Cu(II), O(II);

Cl2O7 - Cl(VII), O(II);

N2O5 - N(V), O(II);

CH4 - C(IV), H(I);

H2S - H(I), S(II).