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Periodic Table of Elements

Element Berkelium - Bk

Comprehensive data on the chemical element Berkelium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Berkelium. Common chemical compounds are also provided for many elements. In addition technical terms are linked to their definitions and the menu contains links to related articles that are a great aid in one's studies.

Berkelium Menu

• Berkelium Page One
  • Overview of Berkelium
  • Berkelium's Name in Other Languages
  • Atomic Structure of Berkelium
  • Chemical Properties of Berkelium
  • Physical Properties of Berkelium
  • Regulatory / Health
  • Who/When/Where/How
• Berkelium Page Two
  • Nuclides / Isotopes
  • Potential Parent Nuclides

Overview of Berkelium

• Atomic Number: 97
• Period: 7
• Series: Actinides

Berkelium's Name in Other Languages

• Latin: Berkelium
• Czech: Berkelium
• Croatian: Berkelij
• French: Berkelium
• German: Berkelium - s
• Italian: Berkelio
• Norwegian: Berkelium
• Portuguese: Berquélio
• Russian: Берклий
• Spanish: Berkelio
• Swedish: Berkelium

Atomic Structure of Berkelium

• Atomic Radius:
• Atomic Volume:
• Covalent Radius:
• Cross Section (Thermal Neutron Capture)σ_a/barns: 710
• Crystal Structure: Hexagonal

  

• Electron Configuration:

  1s² 2s²p⁶ 3s²p⁶d¹⁰ 4s²p⁶d¹⁰f¹⁴ 5s²p⁶d¹⁰f⁸ 6s²p⁶d¹ 7s²

• Electrons per Energy Level: 2,8,18,32,26,9,2

  Shell Model
  

• Ionic Radius: 0.949Å
• Filling Orbital: 5f⁸
• Number of Electrons (with no charge): 97
• Number of Neutrons (most common/stable nuclide): 150
• Number of Protons: 97
• Oxidation States: 4,3
• Valence Electrons: 5f⁸ 6d¹ 7s²

Chemical Properties of Berkelium

• Electrochemical Equivalent: 3.0727g/amp-hr
• Electron Work Function:
• Electronegativity: 1.3 (Pauling); 1.2 (Allrod Rochow)
• Heat of Fusion: kJ/mol
• Incompatibilities:

• Ionization Potential
  • First: 6.23
• Valence Electron Potential (-eV): 45.5

Physical Properties of Berkelium

• Atomic Mass Average: 247
• Boiling Point:
• Coefficient of lineal thermal expansion/K^-1: N/A
• Conductivity

  Electrical:
  Thermal: 0.1 W/cmK

• Density: 14.78g/cc @ 300K (Estimated value)
• Description:

  Man made radioactive metal.

• Flammablity Class:
• Freezing Point: see melting point
• Heat of Vaporization: kJ/mol
• Melting Point: 1259K 986°C 1807°F
• Physical State (at 20°C & 1atm): Solid
• Specific Heat:

Regulatory / Health

• CAS Number
  • 7440-40-6
• 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: G.T.Seaborg, S.G.Tompson, A.Ghiorso, G.T.Seaborg, S.G.Tompson, A.Ghiorso
  • Discovery Location: Berkeley California United States
  • Discovery Year: 1949
  • Name Origin:

    After Berkeley the home town of the University of California.

  • Abundance of Berkelium:
    • 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 of Berkelium:

    Some compounds have been made and studied. Made by bombarding americium with alpha particles. Total world production is probably less than one gram per year.

  • Uses of Berkelium:

    None known

  • Additional Notes:

    Berkelium is only found in nuclear facilities and nuclear research facilities. It is extremely dangerous because it is a very powerful source of radiation, however, one is highly unlikely to ever be exposed to it.

  Berkelium Menu

  • Berkelium Page One
    • Overview of Berkelium
    • Berkelium's Name in Other Languages
    • Atomic Structure of Berkelium
    • Chemical Properties of Berkelium
    • Physical Properties of Berkelium
    • Regulatory / Health
    • Who/When/Where/How
  • Berkelium Page Two
    • Nuclides / Isotopes
    • Potential Parent Nuclides

  References

  A list of reference sources used to compile the data provided on our periodic table of elements can be found on the main periodic table page.

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