DARMSTADTIUM

'Darmstadtium' (IPA: ), formerly called 'ununnilium' (IPA: , 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

History

See also

References

External links

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]
:$,^\{208\}\_\{82\}mathrm\{Pb\}\; +\; ,^\{62\}\_\{28\}mathrm\{Ni\}\; ,\; o\; ,^\{269\}\_\{110\}mathrm\{Ds\}\; +\; ;\; ^1\_0mathrm\{n\}\; ;$
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.

See also

★ Island of stability

References

1. Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.

External links

★ WebElements.com - Darmstadtium

★ IUPAC: Element 110 is named darmstadtium

★ Apsidium - darmstadtium

★ http://www.darmstadtium.de/index.cfm