Element at v1.0.0
100
59bb7cef6d0be2af389077ff012e350dc4cbe3c7608f662235f11cefa41362b4 · where else it appears
Data
{
"atomicMass": 257.09511,
"atomicNumber": 100,
"block": "f",
"boilingPointC": null,
"categoryId": "actinide",
"density": null,
"discoverer": null,
"discoveryYear": "1952",
"electronConfiguration": "[Rn] 5f12 7s2",
"electronegativity": 1.3,
"group": null,
"meltingPointC": 1526.85,
"name": "Fermium",
"period": 7,
"phase": "Solid",
"symbol": "Fm"
}History in this collection
- addedv1.0.0Jun 12, 2026this version