Bohrium msds| properties| cas no| molecular formula | WorldOfChemicals

Bohrium Properties




Bohrium is a synthetic element that is not present in the environment at all. The first convincing synthesis was in 1981 by a German research team led by Peter Armbruster and Gottfried Münzenberg at the Gesellschaft für Schwerionenforschung (Institute for Heavy Ion Research, GSI) in Darmstadt using the Dubna reaction. In 1989, the GSI team successfully repeated the reaction during their efforts to measure an excitation function. During these experiments, 261Bh was also identified in the 2n evaporation channel and it was confirmed that 262Bh exists as two states - a ground state and an isomeric state. The IUPAC/IUPAP Transfermium Working Group report in 1992 officially recognised the GSI team as discoverers of bohrium.

Chemical Properties

Appearance Solid
Atomic Number 107
Atomic Weight 270 g/mol
Block d
CAS Number 54037-14-8
Electron Configuration 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2 4d10 5p64f14 5d10 6s2 6p6 5f14 6d5 7s2
Group 7
Ionization Energy 740 KJ/mol
Oxidation State 7
Period 7
Symbol Bh