Scientists think hassium is a metal, but have not been able to produce enough atoms to study it in detail. Hassium is highly radioactive, and most of its atoms split apart in a few seconds. This element is named after the German state of Hesse, the location of the Heavy Ion Research Center, where hassium was artificially created by a team led by German physicist Peter Armbruster.

Summary of properties (Hs)

Atomic weight[270]
Discoverer (year)Armbruster, Paula & Muenzenberg, Dr. Gottfried (1984)
Natural formmetallic solid (-)
Electron configuration[Rn] 7s2 514 6d6
Melting point (ºC)
Boiling point (ºC)
Abundance in earth's crust (ppm)synthetic
Isotope (abundance)
Density g/cm3
Van der Waals radius (pm)
Covalent radius (pm)134
Electronegativity (Pauling)
Vaporization enthalpy (kJ/mol)-
Enthalpy of fusion (kJ/mol)-
Specific heat capacity (J/g·K) at 25ºC and 1 atm-
Thermal conductivity (W/cm·K) at 25ºC and 1 atm-
Oxidation state
Electron affinity (eV)
1st Ionization potential (eV)

Back to the Periodic Table of the Elements.