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Darmstadtium -
Ds General Information Discovery Hofmann and co-workers in 1994 in Darmstadt, Germany. Appearance Unknown, but probably silvery in appearance Source A man-made element of which only a few atoms have ever been created, by fusing nickel and lead atoms in a heavy ion accelerator. Uses At present, it is only used in research. Biological Role Darmstadtium has no known biological role. It is toxic due to its radioactivity. General Information Darmstadtium decays in 0.17 milliseconds into lighter elements by emitting alpha-particles . It was prepared by 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 269Ds + n. 20882Pb + 6228Ni --> 269Ds + 10n |
| Physical Information | |||
| Atomic Number | 110 | ||
| Relative Atomic Mass (12C=12.000) | 269 | ||
| Melting Point/K | Not known | ||
| Boiling Point/K | Not known | ||
| Density/kg m-3 | Not known | ||
| Ground State Electron Configuration | Not known, but based on platinum, perhaps [Rn]5f146d97s1 | ||
| Electron Affinity(M-M-)/kJ mol-1 | Not known |
| Key Isotopes | ||||||
| nuclide | 269Ds | |||||
| atomic mass | ||||||
| natural abundance | 0% | |||||
| half-life | 0.17 ms |
| Other Information | ||
| Enthalpy of Fusion/kJ mol-1 | Not known | |
| Enthalpy of Vaporisation/kJ mol-1 | Not known | |
| Oxidation States | ||
| Not known | ||
| Ionisation Energies/kJ mol-1 | ||
| M - M+ | Not known | |
| M+ - M2+ | Not known | |
| M2+ - M3+ | Not known | |
| M3+ - M4+ | Not known | |
| M4+ - M5+ | Not known | |
| M5+ - M6+ | Not known | |
| M6+ - M7+ | Not known | |
| M7+ - M8+ | Not known | |
| M8+ - M9+ | Not known | |
| M9+ - M10+ | Not known | |
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