Question

How will you find the valency of a element from its electronic configuration

Answer 1

Answer:

by using formula 2n^2

example:-atomic no. of sodium =11

so it's valency=2,8,1, and the valency is 1

Answer 2

By making the electronic configuration valency of an element can be known.

As the last shell of the electronic Configuration is known as the valence shell. The number of electrons in that shell shows the valency of that element.