History and Production
Named after Darmstadt, Germany, by the IUPAC in August 2003. The element was claimed to have discovered by Oganessian and others at Dubna in 1987.
However, this was confirmed by the discovery of 269Ds by Armbruster in Gesellschaft fur Schwerionenforschung (GSI), Darmstadt, in November 1994.
The element was formed by repeat bombardment of 62Ni with 208Pb for many days. Few days later, 271Ds was produced by
using 64Ni as projectiles.
Only a few atoms have been produce and thus its physical properties cannot be determined.
Interatomic distance: -
Melting point: n/a
Boiling point: n/a
Thermal conductivity/Wm-1K-1: n/a
Standard Thermodynamic Data (atomic gas)
Enthalpy of formation: -
Gibbs free energy of formation: -
Heat capacity: -
Electronic configuration: Electronic configuration: [Rn] 5f14 6d9 7s1
Term symbol: 3D3
Electron affinity: - Electronegativity (Pauline): -
Ionization energy (first, second, third): -, -, - kJ/mol