### 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*)
http://en.wikipedia.org/wiki/Pauli_exclusion_principle

**Referenced by:**

Bose-Einstein statistics

electron degeneracy

particle

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