Question

What is the valency and no. of valence electrons for the electronic configuration
1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 4s^2, 3d^10

Answer 1

The given electronic configuration is of the element "Zinc"
Valency =2
Valency electrons =2

Answer 2

Hey friend here is your answer

valency is the phenomenon of forming chemical bonds.

and no. of valence electrons for the electronic configuration
1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 4s^2, 3d^10
=2

hope it help you ^_^