Science / Periodic Table of Elements / Bohrium (Bh): Atomic number: 107, Atomic mass: 262 g.mol -1, Electronegativity: unknown, Density: unknown, Melting point: unknown, Boiling point: unknown, Vanderwaals radius: unknown, Ionic radius: unknown, Isotopes: 3, Discovered: Peter Armbruster and Gottfried Munzenber in 1976. Bohrium is an artificially produced radioactive element. It is probably silvery or metallic gray. It's most stable isotope, Bh-262 has an half life of 17 seconds. Applications: Bohrium does not have any known application and little is known about it. Bohrium in the environment: Bohrium is not found free in the environment, since it is a synthetic element.