Question

what is a variable valency? ​

Answer 1

Answer:

When an atom shows more than 1 valency called as variable valency . Eg- copper

Answer 2

Variable Valency. Certain elements combine with other atoms, donating, accepting or sharing electrons in different proportions depending on the nature of the reaction. For example, iron combines with oxygen to form ferrous oxide as well as ferric oxide. ... This is termed variable valency.