Question

Consider the following sets of quantum number:	n	$\ell$	m	s
(a)	3	0	0	$+1 / 2$
(b)	2	2	1	$+1 / 2$
(c)	4	3	-2	$-1 / 2$
(d)	1	0	-1	$-1 / 2$
(e)	3	2	3	$+1 / 2$
Which of the following sets of quantum number is not possible:

• A. (ii), (iii) and (iv)
• B. (i), (ii),(iii) and (iv)
• C. (ii), (iv) and (v)
• D. (i) and (iii)

Answer 1

Answer: (C)

(ii), (iv) and (v)

Answer 2

The value of $1$ varies from $0$ to ($n-1$ ) and the value of m varies from $-1$ to $+1$ through zero. The value of 's' $\pm \frac{1}{2}$ which signifies the spin of electron. The correct sets of quantum number are following \begin{array}\& n&l&m&\ \ \ \ s\\\(ii)& 2&1&1&-\frac{1}{2}\\\(iv)& 1&0&0&-\frac{1}{2}\\\(v)& 3&2&2&+\frac{1}{2}\\\ \end{array}