Bohrium is an artificial element named after the Danish Nobel laureate Niels Bohr. This was to honor his model of the electron shell structure of atoms. Bohrium was first produced by colliding chromium atoms with bismuth atoms in a particle accelerator. Atoms of this metal are unstable. Thus, half of any sample of bohrium atoms decays in 61 seconds.

Summary of properties (Bh)

Atomic weight[270]
Discoverer (year)Oganessian (1981)
Natural formmetallic solid (-)
Electron configuration[Rn] 7s2 514 6d5
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)141
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.