Name Bohrium
Symbol Bh
Atomic Number 107
Atomic Mass 155.0 atomic mass unit
Number of Protons 107
Number of Neutrons 155
Number of Electrons 107
Melting Point Unknown
Boiling Point Unknown
Density Unknown
Normal Phase Synthetic
Family Transition Metals
Period 7
Cost Unavailable



Origin of Name After Niels Bohr, a Danish physicist
Date and Place of Discovery In 1976 at the Institute for Nuclear Research in Dubna, Russia
and in 1981 in Darmstadt, Germany
Discovered by Peter Armbruster and Gottfried Munzenberg (Germany)
Y. Oganessian (Russia)
Common Compounds There are no known compounds.
Interesting facts
  • There is little information on bohrium, mainly because its half-life is only seconds long.
  • It has also been known as Unnilseptium (Uns) and Nielsbohrium (Ns).
Common Uses There are no known uses outside of the laboratory.


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Chemical Elements
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