Element:	Darmstadtium
Symbol:	Ds
Atomic number:	110
Atomic weight:	[271]
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Valence

Origin of name: after Darmstadt, Germany, location of the Gesellschaft für Schwerionenforschung (G.S.I.)

In 1987 Oganessian, et al., at Dubna, claimed discovery of this element. Their experiments indicated the spontaneous fissioning nuclide ²⁷²110 with a half-life of 10 ms. Later a group led by Armbruster at G.S.I. in Darmstadt, Germany, reported evidence of ²⁶⁹110, which was produced by bombarding lead for many days with more than 10¹⁸ nickel atoms. A detector searched each collision for Element 110’s distinct decay sequence. On November 9, 1994, evidence of 110 was detected. In 2003 IUPAC approved the name darmstadtium, symbol Ds, for Element 110.

Seven isotopes of Element 110 are now recognized.