Question

why do certain elements exhibit variable valency?​

Answer 1

Answer:

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.

Plz mark as brainliest

Answer 2

Answer:

Some elements (metals) lose electrons from their valence shell and also from the penultimate shell. Hence they show variable valency.