{
  "id": "electron-mass",
  "label": "Electron mass",
  "symbol": "m_e",
  "quantity": {
    "value": 9.1093837015e-31,
    "unit": "kg",
    "uncertainty": 2.8e-40,
    "asOf": "2018-06-01",
    "source": {
      "name": "CODATA",
      "url": "https://physics.nist.gov/cuu/Constants/"
    }
  },
  "sameAs": [
    "https://www.wikidata.org/entity/Q776821"
  ],
  "tags": [
    "physics",
    "particle",
    "mass"
  ]
}