question_answer

The values for all the quantum numbers for 15th 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)  \[n=2,l=0,m=0,s=+1/2\]

Correct Answer: C

Solution :

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