Question

Which of the following set of quantum numbers is correct for an electron in 5d orbital?

• A. $n=5,l=3,m=2,s=+\frac{1}{2}$
• B. $n=5,l=4,m=3,s=+\frac{1}{2}$
• C. $n=5,l=2,m=3,s=+\frac{1}{2}$
• D. $n=5,l=2,m=2,s=+\frac{1}{2}$

Answer 1

The correct option is D $n=5,l=2,m=2,s=+\frac{1}{2}$

For an electron in 5d orbital,
n = 5 and l = 2.
m can have any value from -2 to +2
and s can be $+\frac{1}{2}$ or $-\frac{1}{2}$
So the only possible set of quantum numbers for an electron in 5d orbital from the given options is:
$n=5,l=2,m=2,s=+\frac{1}{2}$