
1) Chemical element 2) Element discovered in 1981 3) Element number 107 4) Element with the symbol Bh 5) Synthetic element
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https://www.crosswordclues.com/clue/bohrium

Bohrium is a chemical element with symbol Bh and atomic number 107, named in honor of Danish physicist Niels Bohr. It is a synthetic element (an element that can be created in a laboratory but is not found in nature) and radioactive; the most stable known isotope, 270Bh, has a half-life of approximately 61 seconds. In the periodic table of the ele...
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http://en.wikipedia.org/wiki/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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http://www.britannica.com/eb/a-z/b/86

Type: Term Pronunciation: bōr′ē-ŭm Definitions: 1. An artificial transplutonium element; atomic number 107; atomic weight 262 [Formerly called Unnilseptium, Uns 262.]
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http://www.medilexicon.com/medicaldictionary.php?t=11129
Bh noun a transuranic element
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https://www.encyclo.co.uk/local/20974

Synthesized, radioactive element of the transactinide series, atomic number 107, relative atomic mass 262. It was first synthesized by the Joint Institute for Nuclear Research in Dubna, Russia, in 1976; in 1981 the Laboratory for Heavy-Ion Research in Darmstadt, Germany, confirmed its existence. Until 1997 it was known by the temporary name...
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https://www.encyclo.co.uk/local/21221
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