Zepto

{
  "id": "MLC-T-CHM-012795",
  "term": "Zepto",
  "field": "Chemistry",
  "definition": "A decimal submultiple prefix of the SI meaning one sextillionth, 10 to the power minus 21, with symbol z. It is used for extremely small amounts and times, such as the zeptosecond, the time light takes to cross a hydrogen molecule, and the zeptomole, roughly 600 molecules. One zeptometre is a sextillionth of a metre.",
  "subject": "Physical and Biophysical Chemistry",
  "references": [
    "Green Book, 2nd ed., p. 74 (https://goldbook.iupac.org/files/pdf/green_book_2ed.pdf)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/zepto/"
}