Question

Which of the following quantum number set is impossible:

• A. $n=5,l=2,m=1,s=\frac{1}{2}$
• B. $n=3,l=3,m=2,s=\frac{1}{2}$
• C. $n=1,l=0,m=0,s=\frac{1}{2}$
• D. $n=2,l=1,m=-1,s=\frac{1}{2}$

Answer 1

The correct option is B $n=3,l=3,m=2,s=\frac{1}{2}$

When the Principle quantum number ($n$) is 3, the possible values of Azimuthal quantum number will be only 0, 1 and 2 which represent $s,p$ and $d$ orbitals respectively. Therefore, the set of quantum numbers given in option ($b$) is impossible.