Q.

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

A. Hund’s
B. Exclusion Principle of Pauli
C. Uncertainty Principle of Giesenberg
D. Avogadro’s law
Answer» B. Exclusion Principle of Pauli
Explanation: The Pauli exclusion principle is the quantum mechanical principle that no two identical fermions (particles with half-integer spin) may occupy the same quantum state simultaneously. A more rigorous statement is that the total wave function for two identical fermions is anti-symmetric with respect to exchange of the particles.
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