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

Question

Which set has the same number of unpaired electrons in their ground state? (A)  Cl-,Fe3+,Cr3+  (B)  Na+,Mg2+,Al  (C)  Na,P,Cl  (D)  N,P,V

Tardigrade Admin · Accepted Answer

Electronic configuration of 7N=[He] 2s22p3 (3 unpaired e- ) Electronic configuration of 15P=[Ne] 3s23p3 (3 unpaired e- ) Electronic configuration of 23V=[Ar] 3d34s2 (3 unpaired e- )

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

$C l^{-}, F e^{3 +}, C r^{3 +}$

$N a^{+}, M g^{2 +}, A l$

$N a, P, Cl$

$N, P, V$

Electronic configuration of $_{7} N = [He] 2 s^{2} 2 p^{3}$ (3 unpaired $e^{-}$ ) Electronic configuration of $_{15} P = [N e] 3 s^{2} 3 p^{3}$ (3 unpaired $e^{-}$ ) Electronic configuration of $_{23} V = [A r] 3 d^{3} 4 s^{2}$ (3 unpaired $e^{-}$ )

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

Cl−,Fe3+,Cr3+

Na+,Mg2+,Al

Na,P,Cl

N,P,V

Electronic configuration of 7​N=[He]2s22p3 (3 unpaired e− ) Electronic configuration of 15​P=[Ne]3s23p3 (3 unpaired e− ) Electronic configuration of 23​V=[Ar]3d34s2 (3 unpaired e− )

$C l^{-}, F e^{3 +}, C r^{3 +}$

$N a^{+}, M g^{2 +}, A l$

$N a, P, Cl$

$N, P, V$

Electronic configuration of $_{7} N = [He] 2 s^{2} 2 p^{3}$ (3 unpaired $e^{-}$ ) Electronic configuration of $_{15} P = [N e] 3 s^{2} 3 p^{3}$ (3 unpaired $e^{-}$ ) Electronic configuration of $_{23} V = [A r] 3 d^{3} 4 s^{2}$ (3 unpaired $e^{-}$ )