### 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 system is an atom's
electrons, 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.),
which adhere to Bose-Einstein statistics.

(*physics,quantum mechanics*)
**Further reading:**

http://en.wikipedia.org/wiki/Pauli_exclusion_principle

**Referenced by pages:**

Bose-Einstein statistics

electron degeneracy

electron pressure

particle

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