Question

Atomic number of chlorine is 17 what is the number of electrons in the valence shell of chlorine

Answer 1

electronic configuration of chlorine is 1s^2 2s^2 2p^6 3s^2 3p^5 hence 7 electrons are present

Answer 2

In k shell the no. Of electron is 2
In L shell the no. Of electron is 8
In M shell the no. Of electron is 7
So in the valence shell the no. Of electron is 7 and the valency is 1