bohrium [bôr′ē əm]
ModL, after Niels BOHR Niels (Henrik David) + -IUM
a radioactive chemical element with a very short half-life: a transactinide produced by bombarding bismuth with high-energy nuclear particles: symbol, Bh; at. no., 107: see the periodic table of elements in the Reference Supplement

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bohr·i·um (bôrʹē-əm, bōrʹ-) n. Symbol Bh
An artificially produced radioactive element with atomic number 107 whose most long-lived isotopes have mass numbers of 261, 262, and 264 with half-lives of 11.8 milliseconds, 0.1 seconds, and 0.44 seconds, respectively. Also called unnilseptium. See table at element.
  [After Bohr, Niels Henrik David.]

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

      In 1976 Soviet scientists at the Joint Institute for Nuclear Research in Dubna, Russia, U.S.S.R., announced that they had synthesized element 107, later given the official name bohrium, by bombarding a target of bismuth-209 with ions of chromium-54. The resultant collisions were reported to have produced an isotope of the element with a mass number of 261 and a half-life of 1–2 milliseconds. The existence of the element was confirmed by West German physicists at the Institute for Heavy Ion Research (Gesellschaft für Schwerionenforschung [GSI]) in Darmstadt.

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Universalium. 2010.

Look at other dictionaries:

  • Bohrium — (pronEng|ˈbɔəriəm) is a chemical element in the periodic table that has the symbol Bh and atomic number 107.It is a synthetic element whose most stable isotope, Bh 270, has a half life of 61 seconds. Chemical experiments confirmed bohrium s… …   Wikipedia

  • Bohrium — Seaborgium ← Bohrium → Hassium Rh …   Wikipédia en Français

  • bohrium — ● bohrium nom masculin (de Bohr, nom propre) Élément chimique artificiel (symbole Bh), de numéro atomique 107, de masse atomique 264,12 …   Encyclopédie Universelle

  • bohrium — Competing name for unnilseptium, the 107th element, proposed by the IUPAC in response to the discoverers of the element wanting to name it nielsbohrium …   Elements of periodic system

  • bohrium — [bôr′ē əm] n. [ModL, after Niels BOHR Niels (Henrik David) + IUM] a radioactive chemical element with a very short half life: a transactinide produced by bombarding bismuth with high energy nuclear particles: symbol, Bh; at. no., 107: see the… …   English World dictionary

  • Bohrium — Eigenschaften …   Deutsch Wikipedia

  • Bohrium — boris statusas T sritis fizika atitikmenys: angl. bohrium vok. Bohrium, n rus. борий, m pranc. bohrium, m …   Fizikos terminų žodynas

  • Bohrium — Boh|ri|um 〈n.; s; unz.; Chem.; kurz für〉 Nielsbohrium * * * Boh|ri|um [nach N. H. D. Bohr; ↑ ium (1)], das; s; Symbol: Bh; früher vorgeschlagene Namen: Nielsbohrium (Ns), (systematisch:) Unnilpentium ( …   Universal-Lexikon

  • bohrium — boris statusas T sritis chemija apibrėžtis Cheminis elementas. simbolis( iai) Bh atitikmenys: lot. bohrium angl. borium rus. борий …   Chemijos terminų aiškinamasis žodynas

  • bohrium — noun Etymology: New Latin, from Niels Bohr Date: 1994 a short lived radioactive element produced artificially see element table …   New Collegiate Dictionary

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