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Pauli exclusion principle

(fermions in a quantum system cannot have identical quantum numbers)

The Pauli exclusion principle, that two fermions (particles with non-integer spin, i.e., -1/2, 1/2, or 3/2, etc.) cannot have the same quantum numbers if within the same quantum system. The typical example is the electrons in an atom, and it is the principle which prevents two electrons from taking the same electron orbital.

The Pauli exclusion principle does not apply to bosons, particles with integer spin, i.e., 0, 1, or 2, etc., and that adhere to Bose-Einstein statistics.

(physics,quantum mechanics)

Referenced by:
Bose-Einstein statistics
electron degeneracy