Question

Some of the elements are having more than one valency. How are their symbols

represented?​

Answer 1

Variable valency mark as brainiest please

Answer 2

Answer:

Certain elements have more than one valency. They exhibit variable valency. For example, copper, tin, iron and mercury exhibit variable valency. Copper combines with oxygen to form cuprous oxide (Cu2O) and cupric oxide (CuO).

Explanation:

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