Question

The values for all the quantum numbers for $15^{th}$ electron of chlorine are

• A. $ n=3,l=1,m=0,s=-1/2 $
• B. $ n=4,l=2,m=0,s=+1/2 $
• C. $ n=3,l=1,m=+1,s=+1/2 $
• D. $ n=2,l=0,m=0,s=+1/2 $

Answer 1

Answer: (C)

Electronic configuration of chlorine is
${ }_{17} C l=1 s^{2}, 2 p^{6}, 3 s^{2} 3 p^{5}$
$n=3 l=1 m=+1$, and $s=+1 / 2$