Q. The representation of the ground state electronic configuration of He by box-diagram as [table] $\uparrow$ | $\uparrow$ [/table] is wrong because it violates
A) Heisenberg’s uncertainty principle
B) Bohr’s quantization theory of angular momenta
C) Pauli exclusion principle
D) Hund’s rule
Explanation
(c)
According to Pauli Exclusion Principle, In any orbital, maximum two electrons can exist, having opposite spin.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.