(B) Isoelectronic species are those that possess the same number of electrons.For $NO^{+}$: $7 + 8 - 1 = 14$ electrons.For $C_2^{2-}$: $6 \times 2 + 2

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

$NO^{+}, C_2^{2-}, CN^{-}, N_2$

(B) Isoelectronic species are those that possess the same number of electrons.For $NO^{+}$: $7 + 8 - 1 = 14$ electrons.For $C_2^{2-}$: $6 \times 2 + 2 = 14$ electrons.For $CN^{-}$: $6 + 7 + 1 = 14$ electrons.For $N_2$: $7 \times 2 = 14$ electrons.Since $NO^{+}, C_2^{2-}, CN^{-}$,and $N_2$ each have $14$ electrons,they are isoelectronic.