Which of the following set of quantum numbers is not possible for an electron in the ground state of an atom with atomic number `19`?

Options

A. n = 2, l = 0, m = 0
B. n = 2, l = 1, m = 0
C. n = 3, l = 1, m = -1
D. n = 3, l = 2, m = +-1

Answer

D

Explanation

`._(19)X =1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 4s^(1)`, l = 2 means d-sub-shell which is not present in X.