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Question

Chemistry Question on subshell electronic configuration

Which set has the same number of unpaired electrons in their ground state?

A

Cl−,Fe3+,Cr3+C{{l}^{-}},F{{e}^{3+}},C{{r}^{3+}}

B

Na+,Mg2+,AlN{{a}^{+}},M{{g}^{2+}},Al

C

Na,P,ClNa,P,Cl

D

N,P,VN,P,V

Answer

N,P,VN,P,V

Explanation

Solution

Electronic configuration of 7N=[He] 2s22p3{}_{7}N=[He]\,2{{s}^{2}}2{{p}^{3}} (3 unpaired e−{{e}^{-}} ) Electronic configuration of 15P=[Ne] 3s23p3{}_{15}P=[Ne]\,3{{s}^{2}}3{{p}^{3}} (3 unpaired e−{{e}^{-}} ) Electronic configuration of 23V=[Ar] 3d34s2{}_{23}V=[Ar]\,3{{d}^{3}}4{{s}^{2}} (3 unpaired e−{{e}^{-}} )