Element at v1.0.0
34
a565ac84aae06513dd8be5915ec5af09675c0ac107d2668a2aa0ecfefb8be5bb · where else it appears
Data
{
"atomicMass": 78.97,
"atomicNumber": 34,
"block": "p",
"boilingPointC": 684.85,
"categoryId": "reactive-nonmetal",
"density": 4.809,
"discoverer": null,
"discoveryYear": "1817",
"electronConfiguration": "[Ar]4s2 3d10 4p4",
"electronegativity": 2.55,
"group": 16,
"meltingPointC": 220.5,
"name": "Selenium",
"period": 4,
"phase": "Solid",
"symbol": "Se"
}History in this collection
- addedv1.0.0Jun 12, 2026this version