Question

define pauli's exclusion principle
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Answer 1

answer: it is related to quantum mechanical principle

explanation : the Pauli exclusion principle is the quantum mechanical principle which states that two /more identical ferminious cannot occupy the same quantum system simultaneously

Answer 2

Pauli Exclusion Principle.

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.