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• Isotopes
• Bohrium Data
• Transition Metals
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Atomic Structure

• Atomic Radius:
• Atomic Volume:
• Covalent Radius:
• Cross Section (Thermal Neutron Capture) Barns: 
• Crystal Structure:
• Electron Configuration:

  1s² 2s²p⁶ 3s²p⁶d¹⁰ 4s²p⁶d¹⁰f¹⁴ 5s²p⁶d¹⁰f¹⁴ 6s²p⁶d⁵ 7s²

• Electrons per Energy Level: 2, 8, 18, 32, 32, 13, 2
• Ionic Radius:
• Filling Orbital:
• Number of Electrons (with no charge): 107
• Number of Neutrons (most common/stable nuclide): 155
• Number of Protons: 107
• Oxidation States:
• Valence Electrons:

Chemical Properties

• Electrochemical Equivalent:
• Electron Work Function:
• Electronegativity: N/A (Pauling); N/A (Allrod Rochow)
• Heat of Fusion: kJ/mol
• Incompatibilities:
• Ionization Potential
  • First:
• Valence Electron Potential (-eV):

Physical Properties

• Atomic Mass Average: 262
• Boiling Point:
• Coefficient of Lineal Thermal Expansion/K^-1: N/A
• Conductivity

  Electrical:
  Thermal:

• Description:

  Man made radioactive element

• Flammablity Class:
• Freezing Point: see melting point
• Heat of Vaporization: kJ/mol
• Melting Point:
• Physical State (at 20°C & 1atm):
• Specific Heat:
• Vapor Pressure:

Regulatory / Health

• CAS Number
  • 54037-14-8
• NFPA 704
  • Health:
  • Fire:
  • Reactivity:
  • Special Hazard: Radioactive<
  • OSHA Permissible Exposure Limit (PEL)
    • No limits set by OSHA
  • OSHA PEL Vacated 1989
    • No limits set by OSHA
  • NIOSH Recommended Exposure Limit (REL)
    • No limits set by NIOSH
  • Levels In Humans:
    Note: this data represents naturally occuring levels of elements in the typical human, it DOES NOT represent recommended daily allowances.
    • Blood/mg dm^-3: nil
    • Bone/p.p.m: nil
    • Liver/p.p.m: nil
    • Muscle/p.p.m: nil
    • Daily Dietary Intake: nil
    • Total Mass In Avg. 70kg human: nil

  Who / Where / When / How

  • Discoverer: Soviet scientists at the Joint Institute for Nuclear Research
  • Discovery Location: Dubna, USSR
  • Discovery Year: 1975
  • Name Origin:

    Named in honor of the Danish physicist Niels Bohr

  • Abundance:
    • Earth's Crust/p.p.m.: nil
    • Seawater/p.p.m.: nil
    • Atmosphere/p.p.m.: nil
    • Sun (Relative to H=1E¹²): N/A
  • Sources:

    Synthetically by bombarding Bi204 with heavy nuclei of CR54.

  • Uses:

    None

  • Additional Notes:

    In 1975 Soviet scientists in Dubna were able to synthesize element 107 which then existed for only 2/1000's of a second. Physicists at the Heavy Ion Research Laboratory in Darmstadt West Germany confirmed this discovery in 1981 by synthesizing and identifying six nuclei of the element. In August of 1997 the International Union of Pure and Applied Chemistry announced the official naming of this element as Bohrium. Like many elements, the discovery date for this element varies from reference source to reference source. We speculate that this is caused by academic and geo-political rivalries.