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Bohrium

Bohrium information, including Technical Data, Safety Data and its high purity properties, research, applications and other useful facts are discussed below. Scientific facts such as the atomic structure, ionization energy, abundance on Earth, conductivity and thermal properties are included.

Bohrium's is appearance is unknown. Little is known about the element and it has no known uses. Bohrium is a synthetic element and therefore is not naturally found in the environment.

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Bohrium Bohr ModelBohrium is a is a D-Block, Group 7, Period 7 element. The number of electrons in each of Bohrium's shells is 2, 8, 18, 32, 32, 13, 2 and its electronic configuration is [Rn] 5f14 6d5 7s2. In its elemental form Bohrium's CAS number is 54037-14-8.

Production of Bohrium was first announced in 1976 by scientists from the USSR and was verified in 1981 in Germany by Peter Armbruster.


 

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Abundance. The following table shows the abundance of Bohrium and each of its naturally occurring isotopes on Earth along with the atomic mass for each isotope.

Isotope Atomic Mass % Abundance on Earth
Bh-260 260.1218 -
Bh-261 261.1218 -
Bh-262 262.12293 (45) -
Bh-263 263.1231 -
Bh-264 264.1247 -
Bh-265 265.1251 -
Bh-266 266.1270 -
Bh-267 267.1277 -
Bh-271 271 -
Bh-272 272 -

The following table shows the abundance of Bohrium present in the human body and in the universe scaled to parts per billion (ppb) by weight and by atom:

  Typical Human Body Universe
by Weight - -
by Atom - -


Ionization Energy. The ionization energy for Bohrium (the least required energy to release a single electron from the atom in it's ground state in the gas phase) is stated in the following table:
1st Ionization Energy 660 kJ mol-1(est)
2nd Ionization Energy kJ mol-1


Conductivity. No data.

Thermal Properties. The melting point and boiling point for Bohrium are stated below. The following chart sets forth the heat of fusion, heat of vaporization and heat of atomization.
Heat of Fusion No data
Heat of Vaporization No data
Heat of Atomization No data


Recent Research & Development for Bohrium
  • NUCLEAR CHEMISTRY: Element 107 Leaves the Table Unturned. Service RF. Science. 2000 Aug 25;289(5483):1270.PMID: 17772986 [PubMed]Related citations

  • Chemical characterization of element 112. Eichler R, Aksenov NV, Belozerov AV, Bozhikov GA, Chepigin VI, Dmitriev SN, Dressler R, Gäggeler HW, Gorshkov VA, Haenssler F, Itkis MG, Laube A, Lebedev VY, Malyshev ON, Oganessian YTs, Petrushkin OV, Piguet D, Rasmussen P, Shishkin SV, Shutov AV, Svirikhin AI, Tereshatov EE, Vostokin GK, Wegrzecki M, Yeremin AV. Nature. 2007 May 3;447(7140):72-5.PMID: 17476264 [PubMed]Related citations

  • Chemical characterization of bohrium (element 107) Eichler R, Bruchle W, Dressler R, Dullmann CE, Eichler B, Gaggeler HW, Gregorich KE, Hoffman DC, Hubener S, Jost DT, Kirbach UW, Laue CA, Lavanchy VM, Nitsche H, Patin JB, Piguet D, Schadel M, Shaughnessy DA, Strellis DA, Taut S, Tobler L, Tsyganov YS, Turler A, Vahle A, Wilk PA, Yakushev AB. Nature. 2000 Sep 7;407(6800):63-5.PMID: 10993071 [PubMed - as supplied by publisher]
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    Formula Atomic Number Molecular Weight Electronegativity (Pauling) Density Melting Point Boiling Point Vanderwaals radius Ionic radius Energy of first ionization
    Bh 107 [ 264 ]             660 kJ mol-1 (est)

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