Question

Nuclear isomerism is exhibited by:

• A. $H$ molecules only
• B. all diatomic molecule
• C. all diatomic molecule having even $Z$ value
• D. all diatomic molecule having odd $Z$ value

Answer 1

The correct option is D all diatomic molecule having odd $Z$ value

Nuclear isomerism is exhibited by all diatomic molecules having an odd $Z$ value.

A nuclear isomer is a metastable state of an atomic nucleus caused by the excitation of one or more of its nucleons (protons or neutrons). Nuclei with odd Z values possess resultant nuclear spin and hence exhibit nuclear isomerism.