What is the order of K,L and M shells in terms of the total number of electrons?

Correct option is D

The correct answer is option (d) M > L > K.

Information booster :

The order of the K, L, and M shells in terms of the total number of electrons, in descending order, is:

1. M shell (third shell): Can hold a maximum of 18 electrons.
2. L shell (second shell): Can hold a maximum of 8 electrons.
3. K shell (first shell): Can hold a maximum of 2 electrons.

So, the order is: M > L > K.