Darmstadtium is a chemical element with the symbol Ds and atomic number 110. It is placed as the heaviest member of group 10, but no known isotope is sufficiently stable to allow chemical experiments to confirm its placing in that group as a heavier homologue to platinum. This synthetic element is one of the so-called super-heavy atoms and was first synthesized in 1994, at a facility near the city of Darmstadt, Germany, from which it takes its name. The longest-lived and heaviest isotope known is ^281aDs with a half-life of ~10 s although a possible nuclear isomer, ^281bDs has an unconfirmed half-life of about 4 minutes.

Darmstadtium was first created on November 9, 1994, at the Gesellschaft für Schwerionenforschung (GSI) in Darmstadt, Germany, by Peter Armbruster and Gottfried Münzenberg, under the direction of professor Sigurd Hofmann. Four atoms of it were detected by a nuclear fusion reaction caused by bombarding a lead-208 target with nickel-62 ions:

In the same series of experiments, the same team also carried out the reaction using heavier nickel-64 ions. During two runs, 9 atoms of ²⁷¹Ds were convincingly detected by correlation with known daughter decay properties: