Q. Identify a molecule which does not exist.
A) $Li_2$
B) $C_2$
C) $O_2$
D) $He_2$
Explanation
[Solution] $He_2$ has bond order (2 - 2)/2 = 0, so it does not exist. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.