Seaborgium
pronounced sE-
'bôr-gE-&m
Atomic Symbol Sg
Atomic Number 106
Atomic Weight 266. Six isotopes from 259 to 266 have been synthesized.
presumably a solid at 298 K
Color unknown, but probably metallic and silvery white or grey in appearance
Seaborgium is a synthetic element that is not present in the environment. Isolation of an observable quantity of seaborgium has never been achieved, and thus seaborgium has no known uses. The reactivity of seaborgium is unknown, but is assumed to be similar to tungsten and molybdenum.
Seaborgium was first created in June 1974 by the Soviet Joint Institute for Nuclear Research in Dubna, USSR, via
Lead(207) + Chromium(54) = Seaborgium (259) + 2 neutrons
Also synthesized in September 1974 at The Lawrence Berkeley Laboratory in California and the Lawrence Livermore National Laboratory, USA, via
Oxygen(18) + Californium(249) = Seaborgium (263) + 4 neutrons.
Also synthesized at the Paul Scherrer Institute (PSI) in Switzerland via
Neon(22) + Californium(248) = Seaborgium (263) + 7 neutrons.
It can also be produced in the breakdown of Hs via
Hassium(273) = Seaborgium(269) + Helium(4)
Element 106 was officially named seaborgium in 1997; named for Glenn T. Seaborg, American nuclear chemist and Nobel prize winner.
tungsten
^
dubnium <-- seaborgium --> bohrium