Question

Explain why? 1. An oxide ion O-2has - 2 charge
2.Magnesium ion, Mg+2 has +2 charge.
3.Sulphide ion, S-2 has - 2 charge​

Answer 1

Answer:

Oxide ion and sulphide ion has -2 charge because it belongs to group 16 in which the valency is -2.

Magnesium ion has +2 charge because it belongs to group 2 in which the valency is 2.