Question

what is the valency of Ni​

Answer 1

But generally in the questions we use +2 valency of Nickel because, valency of an element depends upon the highest energy level of 's' and 'p' shell. For nickel it would be 4s2 so resulting +2 valency by giving both the s-electrons away. Nickel generally shows +2 oxidation state. Hence, the valency of Nickel is 2.

Answer 2

Answer:

Nickel generally shows +2 oxidation state. Hence, the valency of Nickel is 2. However, nickel also shows a valency of zero, 1, 3 and 4 in some compounds.