sea·bor·gi·um (s -bôr g- m)n. Symbol Sg A radioactive synthetic element whose longest-lived isotopes have mass numbers of 259, 261, 263, 265, and 266 with half-lives of 0.9, 0.23, 0.8, 16, and 20 seconds. Atomic number 106. |
seaborgium (Sg)
[sēbôr′gē·əm]
Etymology: Glenn T. Seaborg, American chemist and educator, 1912-1999
a synthetic radioactive element, with a half-life of 0.9 second. Its atomic number is 106, and its atomic mass is 266. It was first synthesized in 1974 by scientists working independently in the United States and Russia.
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