Question

Barium
Magnesium
Strontium
Calcium
Cupric
Ferrous
Zinc
Mercuric
Nickel
Cobaltous
valency
of them​

Answer 1

Explanation:

Ba: 2

Mg:2

Sr: 2

Ca:2

Cu:2

Fe:2

Zn: 2

Ni :2

Co: 2

All are 2+.

Hope this helps

Answer 2

Answer:

Barium 2

Magnesium 2

Strontium 2

Calcium 2

Cupric 2

Ferrous 2

Zinc 2

Mercuric 2

Nickel 2

Cobaltous 2

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