Question

Определите валентность элементов в веществах H³P,Cl²O^7,NaCl,Cal²,Al²S³

Answer 1

H3(I)P(III), Cl2(VII)O7(II), Na(I)Cl(I), Ca(II)I2(I), Al2(III)S3(II).

Answer 2

H(1)P(3)
Cl(7)O(2)
Na(1)Cl(1)
Ca(2)I(1)
Al(3)S(2)