Relative atomic mass

{
  "id": "MLC-T-CHM-010135",
  "term": "Relative atomic mass",
  "field": "Chemistry",
  "definition": "The average mass of atoms of an element, considering the isotopic abundance, compared to 1/12th the mass of a carbon-12 atom. This value is a weighted average of the masses of all naturally occurring isotopes of an element. It is a dimensionless quantity, often closely approximated by the mass number of the most abundant isotope.",
  "synonyms": [
    "atomic weight"
  ],
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "standard atomic weights",
    "unified atomic mass unit"
  ],
  "references": [
    "Green Book, 2nd ed., p. 41 (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 990 (https://doi.org/10.1351/pac199668040957)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/relative-atomic-mass/"
}