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seaborgium
seaborgium , artificially produced radioactive chemical element; symbol Sg; at. no. 106; mass number of most stable isotope 266; m.p., b.p., sp. gr., and valence unknown. Situated in Group 6 of the periodic table , it is expected to have properties similar to those of tungsten .
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"seaborgium." The Columbia Encyclopedia, 6th ed.. 2008. Encyclopedia.com. 13 Feb. 2012 <http://www.encyclopedia.com>. "seaborgium." The Columbia Encyclopedia, 6th ed.. 2008. Encyclopedia.com. (February 13, 2012). http://www.encyclopedia.com/doc/1E1-seaborgm.html "seaborgium." The Columbia Encyclopedia, 6th ed.. 2008. Retrieved February 13, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-seaborgm.html |
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seaborgium
seaborgium (symbol Sg) Synthetic, radioactive, metallic element of the transactinide series. It has a half-life of less than a second. It was thought to have been discovered in 1974 by US nuclear scientist Albert Ghiorso (1915– ) and colleagues at the University of California at Berkeley, but its existence was only proved in 1994. It was named in 1999 after US nuclear chemist Glenn Seaborg (1912–99), having first been temporarily named unnilhexium. Properties: at.no. 106.
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"seaborgium." World Encyclopedia. 2005. Encyclopedia.com. 13 Feb. 2012 <http://www.encyclopedia.com>. "seaborgium." World Encyclopedia. 2005. Encyclopedia.com. (February 13, 2012). http://www.encyclopedia.com/doc/1O142-seaborgium.html "seaborgium." World Encyclopedia. 2005. Retrieved February 13, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O142-seaborgium.html |
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seaborgium
sea·bor·gi·um / sēˈbôrgēəm/ • n. the chemical element of atomic number 106, a very unstable element made by high-energy atomic collisions. (Symbol: Sg) |
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Cite this article
"seaborgium." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 13 Feb. 2012 <http://www.encyclopedia.com>. "seaborgium." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (February 13, 2012). http://www.encyclopedia.com/doc/1O999-seaborgium.html "seaborgium." The Oxford Pocket Dictionary of Current English. 2009. Retrieved February 13, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-seaborgium.html |
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