Given is the electronic configuration of element `X`
`{:(K,L,M,N,),(2,8,11,2,):}`
The number of electrons present with `l = 2` in an atom of element `X` is.

Options

A. 3
B. 6
C. 5
D. 4

Answer

A

Explanation

(a) `X_23 : 1 s^2 2 s^2 2 p^6 3 s^2 3 p^(6) 3 d^3 4 s^2`
No. of electron with `l = 2` are `3 (3 d^3)`.