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n. Symbol Sg
An artificially produced radioactive element with atomic number 106 that has only been produced in trace amounts. The isotope with mass number 266 has the longest confirmed half-life (21 seconds), although heavier isotopes with longer half-lives have been reported. See Periodic Table.
[After Glenn Theodore Seaborg.]
(Elements & Compounds) a synthetic transuranic element, synthesized and identified in 1974. Symbol: Sg; atomic no: 106
[C20: named after Glenn Seaborg]
Symbol Sg A synthetic, radioactive element that is produced by bombarding californium with oxygen ions or bombarding lead with chromium ions. Its most stable isotope has a half-life of about 20 seconds. Atomic number 106. See Periodic Table.
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