NEET2020ChemistryChemical Bonding and Molecular StructureActual
Identify a molecule which does not exist.
Options
- ALi 2
- BC 2
- CO 2
- DHe 2
Correct answer
D. He 2
Step-by-step solution
He 2 = Total electron = 4 = σ 1 s 2 σ 1 s 2 * ⇒ B . O . = 1 2 [ Nb − Na ] = 1 2 [ 2 − 2 ] = 0 Bond order = 0 , so He 2 does not exist.