Ds, Uun; at. no. 110. Group VIII (10). Transuranium element. No stable nuclides. Prepn and decay of isotopes 269110 (T 1/2 ≈170 μsec, α decay) by 208Pb(62Ni,n) and isotopes 271110 (T 1/2 ≈1.1 msec, α decay) and 271m110 (T 1/2 ≈56 msec, α decay) by 208Pb(64Ni,n): S. Hofmann et al., Z. Phys. A 350, 277 (1995). Production of isotope 273110 (T 1/2 ≈76 μsec, α decay) as a decay product of isotope 277112: Y. A. Lazarev, Phys. Rev. C 54, 620 (1996); of isotope 273110 (T 1/2 ≈118 msec, α decay): S. Hofmann et al., Z. Phys. A 354, 229 (1996). Review of production and properties: idem, Rep. Prog. Phys. 61, 639-689 (1998).