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Element Seaborgium (Unnilhexium), Sg


Element 106 was discovered almost simultaneously by two different laboratories: in June 1974, an American research team led by Albert Ghiorso by Albert Ghiorso and Glenn T. Seaborg with coworkers at the Berkeley Laboratory of the University of California synthesized an isotope with mass number 263, and in September 1974, a Soviet team led by G. N. Flerov at the Joint Institute for Nuclear Research at Dubna reported producing an isotope with mass number 259. The preliminary systematic name given by IUPAC was Unnilhexium (symbol Unh). The name Seaborgium (symbol Sg) in honor the American chemist G.T. Seaborg was confirmed by IUPAC for the element 106.


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