Question

Give reasons why 3d transition metals show variable oxidation states

Answer 1

This property is called as variable valency. Some elements show variable valency because of the different electronic configurations. An atom of an element can sometimes lose more electrons than are present in its valence shell i.e. loss from the penultimate shell and hence exhibit more than 1 or variable valency.

Answer 2

Answer:

3d transitions elements are having the tendency to gain some electrons and even lose some electrons