Bohrium



107 hassium
Re
↑
Bh
↓
(Ups)
General
Number bohrium, Bh, 107
transition metals
Block d
Standard atomic weight (272)  g·mol−1
rhenium)
shell 2, 8, 18, 32, 32, 13, 2
Miscellaneous
CAS registry number 54037-14-8
Selected isotopes
Main article: Isotopes of bohrium
iso NA half-life DM DE (MeV) DP
267Bh syn 22 s
272Bh syn 10 s
References

Bohrium (seconds.

Chemistry

Although chemistry is difficult when half-lives are measured in seconds, chromatography techniques were able to provide some data that Bohrium behaves like a member of group 7 of the periodic table.[1]

History

It was chromium-54.

In 1981 a German research team led by Gottfried Münzenberg at the Gesellschaft für Schwerionenforschung (Institute for Heavy Ion Research) in Darmstadt were also able to confirm the Soviet team's results and produce bohrium, this time the longer-lived Bh-262.

The Germans suggested the name nielsbohrium with symbol Ns to honor the Danish physicist Niels Bohr. The Soviets had suggested this name be given to element 105 (dubnium).

There was an systematic element name for this element. In 1994 a committee of IUPAC recommended that element 107 be named bohrium. While this conforms to the names of other elements honoring individuals, where only the surname is taken, it was opposed by many who were concerned that it could be confused with boron. Despite this, the name bohrium for element 107 was recognized internationally in 1997.

References

  1. ^ "Chemistry of Hassium". Gesellschaft für Schwerionenforschung mbH (2002). Retrieved on 2007-01-31.
 
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