
Also known as exclusion principle (physics), principle of exclusion (quantum mechanics), exclusion principle (Fermi-Dirac statistics), Pauli principle
quantum mechanical principle that two identical fermions cannot occupy the same quantum state simultaneously
The Pauli exclusion principle is a rule in quantum mechanics stating that two identical particles (called fermions) cannot exist in the exact same quantum state at the same time. This principle is fundamental to understanding why atoms have the structure they do and why materials have the properties we observe in everyday life.
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