Question

what is the valency of calcium in Ca Co3​

Answer 1

Answer:

Oxidation number of C is +4

Oxidation number of O is -2

CaCO3

x+4+3(-2)

x+4-6

x-2

x=2

Oxidation number of calcium in CaCO3 is +2.

Valency of Calcium is also +2.

Answer 2

Answer:

Ca = +2

Explanation:

Hope this helps mate