Atomic mass constant

{
  "id": "MLC-T-CHM-000898",
  "term": "Atomic mass constant",
  "field": "Chemistry",
  "definition": "A constant with the dimension of mass, equal to one twelfth of the mass of a free carbon-12 atom at rest in its ground state, and written mu. It fixes the size of the unified atomic mass unit, so that 1 u equals mu. CODATA 2018 gives its value as 1.66053906660(50) × 10⁻²⁷ kg.",
  "subject": "Chemistry and Human Health",
  "see_also": [
    "ground state",
    "unified atomic mass unit"
  ],
  "references": [
    "CODATA Bull. 1986, 63, 1 (https://doi.org/10.6028/jres.092.010)",
    "PAC, 1996, 68, 957. 'Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)' on page 962 (https://doi.org/10.1351/pac199668040957)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/atomic-mass-constant/"
}