Darmstadtium

Darmstadtium
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110 meitnerium ← darmstadtium → roentgenium
Pt
↑
Ds
↓
(Uhn)
Periodic Table - Extended Periodic Table


General
Name, Symbol, Number darmstadtium, Ds, 110
Chemical series transition metals
Group, Period, Block 10, 7, d
Appearance unknown, probably silvery
white or metallic gray
Standard atomic weight (282)  g·mol−1
Electron configuration perhaps [Rn] 5f14 6d9 7s1
(in analogy to platinum)
Electrons per shell 2, 8, 18, 32, 32, 17, 1
Phase presumably a solid
CAS registry number 54083-77-1
Selected isotopes
Main article: Isotopes of darmstadtium iso NA half-life DM DE (MeV) DP
281Ds syn 11 s

References
Darmstadtium (IPA: /ˌdɑ(ɹ)mˈʃtatiəm/), formerly called ununnilium (IPA: /ˌjuːnuːˈnɪliəm/, symbol Uun) or eka-platinum, is a chemical element with the symbol Ds and atomic number 110. It is one of the so-called super-heavy atoms. This synthetic element quickly decays: its isotopes of mass 267 to 273 have half-lives measured in microseconds. Heavier isotopes of darmstadtium, of mass 279 and 281, have been subsequently synthesized and are more stable, with half-lives of 180 milliseconds and 11.1 seconds, respectively.

Contents [hide]
1 History
2 See also
3 References
4 External links



[edit] History
Ds was first generated on November 9, 1994 at the Gesellschaft für Schwerionenforschung (GSI) in Darmstadt, Germany by a team headed by Dr. Jorge Rigol. Only a few atoms of it were prepared by nuclear fusion, involving bombarding a lead target with nickel:[1]


The element was named after the place of its discovery, Darmstadt (the GSI is located in Wixhausen, a northern portion of the city). The new name was given to it by the IUPAC on August 16, 2003.





[edit] See also
Island of stability

[edit] References
^ Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.

[edit] External links
Wikimedia Commons has media related to:
DarmstadtiumWebElements.com - Darmstadtium
IUPAC: Element 110 is named darmstadtium
Apsidium - darmstadtium
(German) http://www.darmstadtium.de/index.cfm
Retrieved from "http://en.wikipedia.org/wiki/Darmstadtium"
Categories: Chemical elements | Transition metals