Q. The number of unpaired electrons in a paramagnetic diatomic molecule of an element with atomic number 16 is :
A) 2
B) 3
C) 4
D) 1
Explanation
[Solution from source] Z = 16 is sulphur. S₂ is isoelectronic in its valence shell with O₂, and its two highest electrons occupy the two degenerate π* orbitals singly (Hund's rule). So S₂ has 2 unpaired electrons and is paramagnetic. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.