Scientists think that roentgenium shares many characteristics with precious metals such as gold and silver. However, its atoms break apart in seconds, so its physicochemical properties have not yet been determined. Rhenium was created in Darmstadt (Germany). It is named after Wilhelm Conrad Röntgen, the Nobel laureate who discovered X-rays in 1895.

Summary of properties (Rg)

Atomic weight[281]
Discoverer (year)Hofmann, Sigurd (1994)
Natural formmetallic solid (-)
Electron configuration[Rn] 5f 14 6d10 7s1
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)121
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.