Question

find out elements which have variable valency &
also write its nomenclature​

Answer 1

Explanation:

For example, copper, tin, iron and mercury exhibit variable valency. Copper combines with oxygen to form cuprous oxide (Cu2O) and cupric oxide (CuO). Valency of oxygen being two, combining capacity of copper in the first case is one and that in the second case is two.

Answer 2

Answer:

copper, tin, mercury and iron are some elements having more than one valency.

Copper is a chemical element with the symbol Cu (from Latin: cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity.And so on...

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