Question

Which of the following element shows variable valency?
1.Copper
2.Sodium
3.Calcium
4.Magnesium
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Answer 1

Answer:

Certain elements have more than one valency. They exhibit variable valency. For example, copper, tin, iron and mercury exhibit variable valency.

Explanation:

Copper..

Answer 2

Question :-

Which of the following element shows variable valency?

Answer :-

Copper