Mass

{
  "id": "MLC-T-CHM-013256",
  "term": "Mass",
  "field": "Chemistry",
  "definition": "The base quantity of the International System of Quantities that measures a body's resistance to acceleration and, through gravitation, its weight; unlike weight it does not change with location. Its SI unit is the kilogram, defined since 2019 by fixing the Planck constant at 6.62607015 x 10^-34 J s. It is distinct from amount of substance, which counts entities and is measured in moles.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "base quantity"
  ],
  "references": [
    "Green Book, 2nd ed., p. 12 (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 979 (https://doi.org/10.1351/pac199668040957)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/mass/"
}