Darmstadtium
Atomic Symbol Ds
Atomic Number 110
Atomic Weight 271. Six different isotopes have been synthesized.
presumably a solid at 298 K
Color unknown, but probably metallic and silvery white or grey in appearance
Darmstadtium is a synthetic element that is not present in the environment. Isolation of an observable quantity of darmstadtium has never been achieved, and thus darmstadtium has no known uses. The reactivity of darmstadtium is unknown, but is assumed to be similar to platinum and palladium.
Darmstadtium's most stable isotope, darmstadtium-281, has a half-life of about 1.1 minutes. It decays into hassium-277 through alpha decay (according to http://education.jlab.org/itselemental/ele110.html).
Darmstadtium was first synthesized on November 9, 1994 at the Gesellschaft für Schwerionenforschung a.k.a the Institute for Heavy Ion Research a.k.a. GSI in Darmstadt, Germany. After ten days of bombardiing Bismuth(209) with Iron(58) they produced one single atom unambiguously identified as meitnerium, via
Lead(208) + Nickel(62) = Darmstadtium(269) + 1 neutron
Lead(208) + Nickel(64) = Darmstadtium(271) + 1 neutron
It can also be produced in the breakdown of Uub via
Ununbium(281) = Darmstadtium(277) + Helium(4)
Before May 5, 2003, no name had yet been recommended for element 110, which was therefore called ununnilium, from the Latin roots un for one and nil for zero, under a convention for neutral temporary names proposed by the International Union of Pure and Applied Chemistry (IUPAC) in 1980. The new name is based on Darmstadt, Germany, the city in which it was first created.
platinum
^
meitnerium <-- darmstadtium --> roentgenium