Pauli exclusion principle

{
  "id": "MLC-T-CHM-008555",
  "term": "Pauli exclusion principle",
  "field": "Chemistry",
  "definition": "A quantum mechanical principle asserting that no two identical fermions, such as electrons, can occupy the same quantum state simultaneously within a single quantum system. For electrons in an atom, this implies that no two electrons can have the same set of four quantum numbers: the principal quantum number (n), the azimuthal quantum number (l), the magnetic quantum number (ml), and the spin quantum number (ms). Consequently, any single atomic orbital can accommodate a maximum of two electrons, which must have opposite spins.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "antisymmetry principle",
    "asymmetric",
    "aufbau principle",
    "configuration"
  ],
  "references": [
    "PAC, 1999, 71, 1919. 'Glossary of terms used in theoretical organic chemistry' on page 1956 (https://doi.org/10.1351/pac199971101919)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/pauli-exclusion-principle/"
}