Which of the following species is isoelectronic with CO ?\ A. HCN\ B. $\mathrm{N}_{2}$\ C. $\math

Question

Which of the following species is isoelectronic with CO ?\ A. HCN\ B. $\mathrm{N}_{2}$\ C. $\mathrm{N}_{2}^{+}$\ D. $\mathrm{O}_{2}^{-}$\ E. $\mathrm{C}_{2}^{2-}$\

Professor PC Thomas Classes · Answer

(b) : Isoelectronic species means species having same number of electrons.\ In CO; No. of electrons $=6+8=14$\ In HCN; No. of electrons $=1+6+7=14$\ In $\mathrm{N}_{2}$; No. of electrons $=7+7=14$\ In $\mathrm{C}_{2}^{2-}$; No. of electrons $=2 	imes 6+2=14$\