Negative ion

{
  "id": "MLC-T-CHM-007804",
  "term": "Negative ion",
  "field": "Chemistry",
  "definition": "An atom or molecule that has acquired a net negative electric charge by gaining one or more electrons. Also known as an anion, it is attracted to positively charged electrodes (anodes) during electrolysis. The magnitude of its charge is an integer multiple of the elementary charge, such as Cl⁻ (chloride ion) or SO₄²⁻ (sulfate ion).",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "anion",
    "moiety",
    "positive ion"
  ],
  "references": [
    "Orange Book, 2nd ed., p. 204 (https://media.iupac.org/publications/analytical_compendium/)",
    "PAC, 1991, 63, 1541. 'Recommendations for nomenclature and symbolism for mass spectroscopy (including an appendix of terms used in vacuum technology). (Recommendations 1991)' on page 1549 (https://doi.org/10.1351/pac199163101541)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/negative-ion/"
}