# Find the Maximum Numbers f Electerons that can be Present in M-shell?

Which of the following is the maximum numbers of electrons that can be present in M-shell ?

- 2
- 8
- 18
- 32

**Answer: (3) 18**

The maximum number of electrons that can found in a shell

Electron Capacity = 2n^{2}

where, n = the number of energy level.

The energy level of M – shell = 3

then , the number of electrons in M – shell = 2 x 3^{2} = 2 x 9

= 18 electrons

3. 18

(*M*–*shell*), s, p, d, 18 (2 in s, 6 in p, 10 in d)