Sg

Seaborgium

Identification

CAS Number: 54038-81-2

Discovery Year: 1974

Discoverer: Soviet Nuclear Research/ U. of Cal at Berkeley

Discovery Location: USSR/United States

Properties

Atomic Mass: 271 →Density: 35 g/cm³ →

Electronic Structure

Electron Config: [Rn] 5f14 6d4 7s2

Block: d

Period: 7 →Group: 6 →

Abundance & Geochemistry

Goldschmidt Class: synthetic

About

Half-life of 0.9 +/- 0.2 s. Discovered by the Joint Institute for Nuclear Research at Dubna (U.S.S.R.) in June of 1974. Its existence was confirmed by the Lawrence Berkeley Laboratory and Livermore National Laboratory in September of 1974.

Isotopes

Sg-269 269 ☢ 8.00 min

Sg-271 271 ☢ 3.10 min