Question

Explain giving reason, which of the following sets of quantum numbers are not possible:

(i) n = 1,l = 1,m_l = 0, m_s = \(+\frac{1}{2}\)

(ii) n = 0,l = 2, m_l = -2, m_s = \(+\frac{1}{2}\)

Answer 1

(i) When n = 1, value of l cannot be equal to 1. Thus it is not possible.

(ii) Value of n i.e., shell starts from 1 and not from zero. Thus, it is not possible.