e07844c21d57427e…

Element
ID: 109372 bytesFirst seen Jun 12, 20261 collection

Fields

NameValue
atomicMass277.154
atomicNumber109
blockd
boilingPointCnull
categoryIdtransition-metal
densitynull
discoverernull
discoveryYear1982
electronConfiguration[Rn]7s2 5f14 6d7 (calculated)
electronegativitynull
group9
meltingPointCnull
nameMeitnerium
period7
phaseSolid
symbolMt

Canonical JSON

{
  "id": "109",
  "type": "Element",
  "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"
  }
}

Appears in 1 collection

reference/periodic-table1 version · Jun 12, 2026

Full hash:e07844c21d57427ee27a0f63b4bc99a2bf479d6bdb422b6f7fe150de4b9468bf