Question

what is the valency of nickel

Answer 1

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◆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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Answer 2

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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. 

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