Hund rules

{
  "id": "MLC-T-CHM-005432",
  "term": "Hund rules",
  "field": "Chemistry",
  "definition": "A set of principles used to determine the ground state electron configuration of an atom or molecule when multiple electron arrangements are possible for a given set of degenerate orbitals. The first rule states that for a given electron configuration, the term with the maximum multiplicity has the lowest energy. The second rule specifies that for a given multiplicity, the term with the largest orbital angular momentum quantum number has the lowest energy.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "angular momentum",
    "chemical induction",
    "degenerate orbitals"
  ],
  "references": [
    "PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2246 (https://doi.org/10.1351/pac199668122223)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/hund-rules/"
}