bohrium

bohrium

[bawr-ee-uhm, bohr-]
noun Chemistry, Physics.
a superheavy, synthetic, radioactive element with a very short half-life. Symbol: Bh; atomic number: 107.
Formerly unnilseptium, element 107.


Origin:
named after Danish physicist Niels Bohr; see -ium

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World English Dictionary
bohrium (ˈbɔːrɪəm)
 
n
element 107, Former names: unnilseptium a transuranic element artificially produced in minute quantities by bombarding 204Bi atoms with 54Cr nuclei. Symbol: Bh; atomic no: 107
 
[C20: after Neils Bohr]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
bohrium   (bôr'ē-əm)  Pronunciation Key 
Symbol Bh
A synthetic, radioactive element that is produced by bombarding bismuth with chromium ions. Its most long-lived isotopes have mass numbers of 261, 262, and 264 with half-lives of 11.8 milliseconds, 0.1 second, and 0.44 second, respectively. Atomic number 107. See Periodic Table.
The American Heritage® Science Dictionary
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Encyclopedia Britannica
Encyclopedia

bohrium

a synthetic element in Group VIIb of the periodic table. It is thought to be chemically similar to the rare metal rhenium.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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