Question

Atomic Number of chlorine is 17 .

What is the number of electrons
in the valance shell of chlorine ​

Answer 1

The Atomic number of chlorine I.e. Cl is 17 and it's electronic configuration is 2,8,7. Since it has 7 valence electrons in it's outermost shell and it needs one electron to complete it's octet. Hence, it's valency is -1.

Answer 2

2,8,7 number of electrons

in the valance shell of chlorine