Question

определите валентность Ar2S3, HY(йод), Y2O7, NH3,H2Se,MgCe2,MgO,MgBr2

Answer 1

1. (3) (2)
2. (1) (1)
3.(7) (2)
4.(3) (1)
5. (1) (2)
6. (2) (1)
7.(2) (2)
8. (2) (1)