Berkelium Elemental Symbol
Berkelium



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Berkélium Berkelium Berkelio Berquélio Berkelio Berkelium

Berkelium Bohr ModelBerkelium is a Block F, Group 3, Period 7 element. The number of electrons in each of berkelium's shells is 2, 8, 18, 32, 27, 8, 2 and its electron configuration is [Rn] 5f9 7s2. The berkelium atom has a radius of 170.pm. It is radioactive and harmful as a result. In its elemental form, berkelium's CAS number is 7440-40-6. Berkelium is produced in nature by beta decay and neutron capture in highly concentrated uranium-bearing deposits. It is the rarest naturally occurring element. Berkelium was discovered by Stanley G. Thompson, Albert Ghiorso and Glenn T. Seaborg at the Lawrence Berkeley Natinal Laboratory in 1949. It was the fifth synthetic transuranium element of the actinide series to be discovered.

Berkelium 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.


  • Properties
  • Research
  • Isotopes
  • Other Elements

Berkelium Properties


GENERAL PROPERTIES   PHYSICAL PROPERTIES  
Symbol: Bk Melting Point: 986 oC, 1806.8 oF, 1259.15 K
Atomic Number: 97 Boiling Point: N/A
Atomic Weight: 247 Density: 14790 kg m-3
Element Category: Actinide Liquid Density @ Melting Point: N/A
Group, Period, Block: n/a, 7, f Specific Heat: N/A
    Heat of Vaporization N/A
CHEMICAL STRUCTURE Heat of Fusion N/A
Electrons: 97 Thermal Conductivity: 10 W·m−1·K−1
Protons: 97 Thermal Expansion: N/A
Neutrons: 150 Electrical Resistivity: N/A
Electron Configuration: [Rn] 5f97s2 Electronegativity: 1.3 (Pauling scale)
Atomic Radius: 170 pm Tensile Strength: N/A
Covalent Radius: N/A Molar Heat Capacity: N/A
Van der Waals radius: N/A Young's Modulus: N/A
Oxidation States: 3, 4 Shear Modulus: N/A
Phase: Solid Bulk Modulus: N/A
Crystal Structure: hexagonal close-packed Poisson Ratio: N/A
Magnetic Ordering: paramagnetic Mohs Hardness: N/A
1st Ionization Energy: 601 kJ·mol−1 (estimated) Vickers Hardness: N/A
2nd Ionization Energy: N/A Brinell Hardness: N/A
3rd Ionization Energy: N/A Speed of Sound: N/A
       
IDENTIFIERS   MISCELLANEOUS  
CAS Number: 7440-40-6 Abundance in typical human body, by weight: N/A
ChemSpider ID: 22409 Abundance in typical human body, by atom: N/A
PubChem CID: 23971 Abundance in universe, by weight: N/A
MDL Number: N/A Abundance in universe, by atom: N/A
EC Number: N/A Discovered By: Lawrence Berkeley Nat'l Laboratory
Beilstein Number: N/A Discovery Date: 1949
SMILES Identifier: [Bk]  
InChI Identifier: InChI=1S/Bk Other Names: Berkelio, Berquélio
InChI Key: PWVKJRSRVJTHTR-UHFFFAOYSA-N  
       
       
       
       
       


Recent Research & Development for Berkelium

  • Gerard F. Payne, Joseph R. Peterson, Possible stabilization of the tetravalent oxidation state of berkelium and californium in acetonitrile with triphenylarsine oxide, Inorganica Chimica Acta, Volume 139, Issues 1–2, 1 December 1987
  • J.K Gibson, R.G Haire, Preparation and X-ray diffraction studies of hydrides of curium, berkelium and californium, Journal of the Less Common Metals, Volume 127, January 1987
  • D.E. Hobart, J.R. Peterson, The chemistry of berkelium: A review, Journal of the Less Common Metals, Volume 121, July 1986
  • J.K. Gibson, R.G. Haire, Preparation and X-ray diffraction studies of berkelium hydrides, Journal of the Less Common Metals, Volume 109, Issue 2, 15 July 1985
  • R.G Haire, J.R Peterson, U Benedict, C Dufour, X-ray diffraction of berkelium metal under pressure to 57 GPa, Journal of the Less Common Metals, Volume 102, Issue 1, September 1984
  • Yuan-fang Liu, Cheng Luo, Hans R. von Gunten, Glenn T. Seaborg, A procedure for a fast separation of berkelium and cerium, Inorganic and Nuclear Chemistry Letters, Volume 17, Issues 7–8, 1981
  • J. Fuger, R.G. Haire, J.R. Peterson, A new determination of the enthalpy of solution of berkelium metal and the standard enthalpy of formation of Bk3+ (aq), Journal of Inorganic and Nuclear Chemistry, Volume 43, Issue 12, 1981
  • D.D. Ensor, J.R. Peterson, R.G. Haire, J.P. Young, Absorption spectrophotometric study of berkelium(III) and (IV) fluorides in the solid state, Journal of Inorganic and Nuclear Chemistry, Volume 43, Issue 5, 1981
  • R.P. Turcotte, T.D. Chikalla, R.G. Haire, J.A. Fahey, Phase behaviour in the berkelium-oxygen system, Journal of Inorganic and Nuclear Chemistry, Volume 42, Issue 12, 1980
  • J.N Stevenson, J.R Peterson, Preparation and structural studies of elemental curium-248 and the nitrides of curium-248 and berkelium-249, Journal of the Less Common Metals, Volume 66, Issue 2, August 1979
  • C.B. Finch, R.L. Fellows, J.P. Young, Self-luminescence of several fluorite-structure halides doped with curium or berkelium, Journal of Luminescence, Volume 16, Issue 1, January 1978
  • R.G. Haire, J.A. Fahey, The oxysulfates and oxysulfides of americium, curium and berkelium, Journal of Inorganic and Nuclear Chemistry, Volume 39, Issue 5, 1977
  • J. Fuger, J.R. Peterson, J.N. Stevenson, M. Noé, R.G. Haire, Determination of the heat of solution of berkelium metal, Journal of Inorganic and Nuclear Chemistry, Volume 37, Issues 7–8, July–August 1975
  • R.G. Gutmacher, D.D. Bodé Jr., R.W. Lougheed, E.K. Hulet, The stability of tetravalent berkelium in acid solution and the absorption spectra of Bk(IV) and Bk(III), Journal of Inorganic and Nuclear Chemistry, Volume 35, Issue 3, March 1973
  • R.M. Harbour, Elution positions of europium, berkelium, terbium and einsteinium from a cation exchange resin column with a-hydroxyisobutyric acid, Journal of Inorganic and Nuclear Chemistry, Volume 34, Issue 8, August 1972
  • J.A. Fahey, J.R. Peterson, R.D. Baybarz, Some properties of berkelium metal and the apparent trend toward divalent character in the transcurium actinide metals, Inorganic and Nuclear Chemistry Letters, Volume 8, Issue 1, January 1972
  • R.P. Turcotte, T.D. Chikalla, L. Eyring, Oxygen decomposition pressures and thermodynamic data for nonstoichiometric berkelium berkelium oxide, Journal of Inorganic and Nuclear Chemistry, Volume 33, Issue 11, November 1971
  • J.R. Peterson, J.A. Fahey, R.D. Baybarz, The crystal structures and lattice parameters of berkelium metal, Journal of Inorganic and Nuclear Chemistry, Volume 33, Issue 10, October 1971
  • R.C. Propst, M.L. Hyder, Electrochemistry of berkelium in acidic aqueous solution, Journal of Inorganic and Nuclear Chemistry, Volume 32, Issue 7, July 1970
  • E.P. Horwitz, C.A.A. Bloomquist, D.J. Henderson, D.E. Nelson, The extraction chromatography of americium, curium, berkelium and californium with di(2-ethylhexyl)orthophosphoric acid, Journal of Inorganic and Nuclear Chemistry, Volume 31, Issue 10, October 1969


Berkelium Isotopes


Berkelium is an artificial element. It has no stable isotopes.