Bh Bohrium
Formally known as Ns NielsbohriumProposed Name
Atomic Number: 107
Atomic Symbol:
Atomic Weight: 262
Electron Configuration:[Rn]7s^2 5f^14 6d^5History
In 1976 Soviet scientists at Dubna announced they had synthesized element 107 by bombarding 204Bi
with heavy nuclei of 54Cr. Reports say that experiments in 1975 had allowed scientists "to glimpse" the
new element for 2/1000 s. A rapidly rotating cylinder, coated with a thin layer of bismuth metal, was
used as a target. This was bombarded by a stream of 54Cr ions fired tangentially.
The existence of element 107 was confirmed by a team of West German physicists at the Heavy Ion
Research Laboratory at Darmstadt, who created and identified six nuclei of element 107.
Sources: CRC Handbook of Chemistry and Physics and the American Chemical Society.
Last Updated: 10/20/1999, CST Information Services Team
Neilsboriumhttp://pearl1.lanl.gov/periodic/elements/107.html [5/17/2001 4:06:42 PM]