Element at v1.0.0
61
41e33e0012d70323f038cc640f33f1edd4d5a74fa42b50bc797bc9f4a2f999ef · where else it appears
Data
{
"atomicMass": 144.91276,
"atomicNumber": 61,
"block": "f",
"boilingPointC": 2999.85,
"categoryId": "lanthanide",
"density": 7.26,
"discoverer": null,
"discoveryYear": "1945",
"electronConfiguration": "[Xe]6s2 4f5",
"electronegativity": null,
"group": null,
"meltingPointC": 1041.85,
"name": "Promethium",
"period": 6,
"phase": "Solid",
"symbol": "Pm"
}History in this collection
- addedv1.0.0Jun 12, 2026this version