Question

CI-has completely filled K&L she'll. explain.

Answer 1

bcoz the electronic configuration of cl is 2,8,7 so k and l shell is full
hope it help u :-)

Answer 2

Atomic number of Cl : 17
Electronic configuration : 2, 8, 7
and from the electronic configuration we can see that the max. number of electrons that can be accommodated in k and l shell are filled.

Hope this helps you...:)