Question

The four quantum number of the valence electron of potassium are:

	$n$	$l$	$m$	$s$
(1)	4	0	0	1/2
(2)	4	1	0	1/2
(3)	4	0	1	1/2
(4)	4	1	1	1/2

• A. 4 0 0 1/2
• B. 4 1 0 1/2
• C. 4 0 1 1/2
• D. 4 1 1 1/2

Answer 1

The correct option is A 4 0 0 1/2

Electronic configuration of ${}^{\prime }{K}^{\prime }\to 1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^1$
$n=4,l=0,m=0,s=\frac{1}{2}$