Question

Does nickel exhibit variable valency? If so ,what are the valencies it exhibits?

Answer 1

Answer:

Transition metals nickel, copper, tin and iron exhibit variable valency. Nonmetals such as nitrogen and oxygen also show variable valency. The products formed as a result of reaction with the different valency atoms differ in their properties.

Hope it helps you

Answer 2

Answer:

Nickel has variable valency as it belongs to D-Block of the modern periodic table.

Valency of Nickel is +1 , + 2 , +3 and +4

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

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