Bohrium
Formally known as Ns Nielsbohrium
Proposed Name
| Atomic Number: |
107 |
| Atomic Symbol: |
|
| Atomic Weight: |
262 |
| Electron Configuration: |
[Rn]7s25f146d5 |
History
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
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