Q. The number of $2p$-electrons having spin quantum numbers $s = \ - \ 1/2$ are
A) 6
B) 0
C) 2
D) 3
Explanation
(d)
For 2$p$-subshell,
[image:2_image32.emf]
Hence, number of $e^{-}with\ s = - \frac{1}{2}is\ 3$.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.