Question

What do you mean by a variable Valency? Write two examples of elements showing variable Valency.How can an atom show variable valency?​

Answer 1

Answer:

variable valency means elements show more than one valency.

i.e., Sulphur=2,4,6

cl = 1,3,5,7

Answer 2

Variable Valency means if any metallic element can lose electrons from its under shells also rather from its outer shells. These elements show variable valency .Example.-The Valency of Fe in FeO is +2And Fe in Fe2O3 is +3Hope it helps !! Have a good day!!