The correct set of quantum numbers for the unpaired electron of chlorine atom is

Options

A. `2,0,0 , + 1/2`
B. `3,0,0, +- 1/2`
C. `2,1,-1, + 1/2`
D. `3,1,1, + 1/2`

Answer

D

Explanation

`Cl(Z = 17) : 1s^2 2s^2 2p^6 3s^2 3p^5`
The unpaired electron of Cl is in 3p orbital.
Hence, quantum numbers for unpaired electron are :
`n = 3, l = 1, m = +1, 0, -1, s = +1/2 "or " -1/2` .