Question

Найти валентность Pb2O, K2O, Al2S3, Cr2O3, HF, PH3

Answer 1

Pb2 (^+1) O (^-2)
K2 (^+1) O (^-2)
Al2 (^+3) S3 (^-2)
Cr2 (^+3) O3 (^-2)
H (^+1) F (^-1)
P (^+3) H3 (^-1)

Answer 2

Pb2O - Pb (I) O(II)
K2O - K (I) O(II)
Al2S3 - Al (III) S (II)
Cr2O3 - Cr (III) O (II)
HF - H (I или II) F (I или II)
PH3 - P (III) H (I)