Question

Which one of the following constitutes a group of the isoelectronic species?

Answer 1

(c) : Number of electrons in each species are given below

N₂ = 14    CN^– = 14

O₂^– = 17   C₂^2– = 14

NO⁺ = 14    O₂^2– = 18

CO = 14     NO = 15
It is quite evident from the above that NO⁺,C₂^2–, CN^–, N² and CO are isoelectronic in nature.
Hence option (c) is correct.