Element 110 is Darmstadtium, 269Ds110

On August 16, 2003, at the 42nd General Assembly in Ottawa, Canada, the IUPAC Council officially approved the name for element of atomic number 110, to be known as darmstadtium, with symbol Ds. according to www.iupac.org/news/archives/2003/naming110.html

In 2001, a joint IUPAC-IUPAP Working Party (JWP) confirmed the discovery of element of atomic number 110 and this by the collaboration of Hofmann et al. from the Gesellschaft fr Schwerionenforschung mbH (GSI) in Darmstadt, Germany (Pure Appl. Chem. 73, 959-967 (2001)). The most relevant experiment resulted from the fusion-evaporation using a 62Ni beam on an isotopically enriched 208Pb target, which produced four chains of alpha-emitting nuclides following the presumed formation of 269Uun(element 110) + n. (S. Hofmann et al., Z. Phys. A350, 277-280 (1995)).

With the name and symbol, we now can write the reaction equation of bombardment of lead with nickel ions as:

208Pb + 62Ni #174; 269Ds110 + n In accordance with IUPAC procedures, the discoverers at the GSI were invited to propose a name and symbol for element 110. They proposed the name darmstadtium, with the symbol Ds. Thus continues the long-established tradition of naming an element after the place of its discovery.

Naming the Elements has more information about this element.