109

e07844c21d57427ee27a0f63b4bc99a2bf479d6bdb422b6f7fe150de4b9468bf · where else it appears

Data

{
  "atomicMass": 277.154,
  "atomicNumber": 109,
  "block": "d",
  "boilingPointC": null,
  "categoryId": "transition-metal",
  "density": null,
  "discoverer": null,
  "discoveryYear": "1982",
  "electronConfiguration": "[Rn]7s2 5f14 6d7 (calculated)",
  "electronegativity": null,
  "group": 9,
  "meltingPointC": null,
  "name": "Meitnerium",
  "period": 7,
  "phase": "Solid",
  "symbol": "Mt"
}

History in this collection

addedv1.0.0Jun 12, 2026this version