Question

Which of the following is not a permissible arrangement of electrons in an atom?

• A. n = 3, l = 2, m = +1, $s=-\frac{1}{2}$
• B. n = 4, l = 0, m = 0, $s=-\frac{1}{2}$
• C. n = 5, l = 3, m = 0, $s=+\frac{1}{2}$
• D. n = 3, l = 2, m = -3, $s=-\frac{1}{2}$

Answer 1

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

$n=3,l=2,m=-3,s=\frac{-1}{2}$

$m=2l+1,$ thus for $l=2$

$m=2\left(2\right)+1$

$m=5$

Hence value of m will be $-2,-1,0,+1,+2$

For $l=2,m$ cannot have value of $-3.$