Unified atomic mass unit

{
  "id": "MLC-T-CHM-012428",
  "term": "Unified atomic mass unit",
  "field": "Chemistry",
  "definition": "A standard unit of mass for expressing the masses of atoms, molecules, and subatomic particles, symbolized as 'u'. It is defined as exactly one-twelfth of the mass of a single, unbound carbon-12 atom in its nuclear and electronic ground state. The value of the unified atomic mass unit is approximately 1.660539 x 10^-27 kilograms.",
  "synonyms": [
    "atomic mass unit"
  ],
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "atomic mass constant",
    "ground state"
  ],
  "references": [
    "Green Book, 2nd ed., p. 75 (https://goldbook.iupac.org/files/pdf/green_book_2ed.pdf)",
    "PAC, 1996, 68, 957. 'Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)' on page 997 (https://doi.org/10.1351/pac199668040957)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/unified-atomic-mass-unit/"
}