Periodic Table


Atomic number: 107
Atomic weight: 262
Symbol: Bh
Group number: 7
Electronic configuration: [Rn].5f14.6d5.7s2 (a guess based upon that of rhenium)


Bohrium is a synthetic element that is not present in the environment at all. The German discoverers at GSI proposed the name Nielsbohrium (symbol Ns) after Niels Bohr. IUPAC are happy to name an element after Bohr but suggest bohrium (Bh) on the grounds that the first name of a person does not appear in the names of any other element named after a person. This seems to have been accepted by all concerned.

General information

Discoveror: Peter Armbruster, Gottfried Münzenber and their co-workers.
Date discovered: 1981
Discovered at: Gesellschaft für Schwerionenforschung (GSI) in Darmstadt, Germany.
Meaning of name: The origin of the name is Niels "Bohr", the Danish physicist.

Physical data

Standard state: unknown but presumably a solid at 298 K
Colour: thalpy


This section gives some data for naturally occurring isotopes.
Nominal mass Accurate mass % natural abundance

Further Information

Copyright 1997 Mark Winter
Department of Chemistry at the University of Sheffield, Sheffield S3 7HF, England.

The current version of this document is at http://www.shef.ac.uk/~chem/web-elements-I/Bh.html