Which of the following represents the electronic configuration of an element with atomic number 17

Options

A. `1s^2, 2s^2 2p^6 , 3s^1 3p^6`
B. `1s^2 , 2s^2 2p^6 , 3s^2 3p^4 , 4s^1`
C. `1s^2 , 2s^2 2p^6 , 3s^2 3p^5`
D. `1s^2 , 2s^2 2p^6, 3s^1 3p^4 , 4s^2`

Answer

C

Explanation

Atomic no. 17 is of chlorine