'All the four quantum numbers of two electrons in an atom are not the same.' It is the law of –

A. Hund's rule of maximum multiplicity

B. Exclusion Principle of Pauli

C. Uncertainty Principle of Hiesenberg

D. Avogadro's Law

Answer: Option B

Solution(By Examveda Team)

The Pauli Exclusion Principle states that, in an atom or molecule, no two electrons can have the same four electronic quantum numbers. As an orbital can contain a maximum of only two electrons, the two electrons must have opposing spins.