Question

Among the following sets of quantum numbers. Which one is incorrect for $4d$ electron ?

• A. $4, 3, 2, + \frac{1}{2}$
• B. $4, 2, 1, 0$
• C. $4, 2, - 2, + \frac{1}{2}$
• D. $4, 2, 1, - \frac{1}{2}$

Answer 1

Answer: (B)

$4, 2, 1, 0$

Answer 2

The correct option is (B): $4, 2, 1, 0$.
The electron orbital,
n=4,I=2,
m=±2,
o and s=± $\frac{1}{2}$.
Thus the correct answer is : 4, 2,1, 0