Определите валентность элементов в следующих веществах
Ag2O PH3 P2O5 HBr

1) 1 и 2 3 и 1 4 и 2 1 и 1
2)1 и 1 1 и 2 3 и 1 4 и 2
3)1 и 2 4 и 2 1 и 1 3 и 1
4) 1 и 2 4 и 2 3 и 1 1 и 1
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