Q. Which one of the following constitutes a group of the isoelectronic species?
A) $C_{2}^{2 -},\ O_{2}^{-},\ CO,\ NO$
B) $NO^{+},\ C_{2}^{2 -},\ {CN}^{-},\ N_{2}$
C) ${CN}^{-},\ N_{2\ },\ O_{2}^{2 -},\ {CO}_{3}^{2 -}\$
D) $N_{2\ },\ O_{2}^{-},\ {NO}^{+},\ CO$
Explanation
(b)
Isoelectronic species have same number of electrons, $NO^{+},\ C_{2}^{2 -},\ {CN}^{-}\ and\ \ N_{2}$. All have 14 electrons.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.