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KCaBerkelium Isotope DataScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr
RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe
CsBaLaCePrNdPmSmEuGdTbDyHoErTmYbLuHfTaWReOsIrPtAuHgTlPbBiPoAtRn
FrRaAcThPaUNpPuAmCmBkCfEsFmMdNoLrRfDbSgBhHsMtDsRgCnNhFlMcLvTsOg

Technical data for Berkelium

Click any property name to see plots of that property for all the elements.

Overview
NameBerkelium
SymbolBk
Atomic Number97
Atomic Weight247[note]
Density14.78 g/cm3
Melting Point1050 °C[note]
Boiling PointN/A

Thermal properties
PhaseSolid
Melting Point1050 °C[note]
Boiling PointN/A
Absolute Melting Point1323 K[note]
Absolute Boiling PointN/A
Critical PressureN/A
Critical TemperatureN/A
Heat of FusionN/A
Heat of VaporizationN/A
Specific HeatN/A
Adiabatic IndexN/A
Neel PointN/A
Thermal Conductivity10 W/(m K)
Thermal ExpansionN/A

Bulk physical properties
Density14.78 g/cm3
Density (Liquid)N/A
Molar Volume0.00001671177266576
Brinell HardnessN/A
Mohs HardnessN/A
Vickers HardnessN/A
Bulk ModulusN/A
Shear ModulusN/A
Young ModulusN/A
Poisson RatioN/A
Refractive IndexN/A
Speed of SoundN/A
Thermal Conductivity10 W/(m K)
Thermal ExpansionN/A

Reactivity
Valence4
Electronegativity1.3
ElectronAffinityN/A
Ionization Energies
601 kJ/mol

Health and Safety
DOT Hazard ClassN/A
DOT NumbersN/A
RTECS NumberN/A
NFPA LabelN/A

Classifications
Alternate NamesNone
Names of AllotropesNone
Blockf
GroupN/A
Period7
SeriesActinide
Electron Configuration[Rn]7s25f9
ColorN/A
Discovery
1949 in The United States
Gas phaseN/A
CAS NumberCAS7440-40-6
CID Number
CID23971
RTECS NumberN/A

Electrical properties
Electrical TypeN/A
Electrical ConductivityN/A
ResistivityN/A
Superconducting PointN/A

Magnetic properties
Magnetic TypeN/A
Curie PointN/A
Mass Magnetic SusceptibilityN/A
Molar Magnetic SusceptibilityN/A
Volume Magnetic SusceptibilityN/A

Abundances
% in UniverseN/A
% in Sun0%
% in Meteorites0%
% in Earth's Crust0%
% in Oceans0%
% in Humans0%

Atomic dimensions and structure
Atomic RadiusN/A
Covalent RadiusN/A
Van der Waals RadiusN/A
Crystal StructureSimple Hexagonal
Lattice Angles
π/2, π/2, 2 π/3
Lattice Constants
341.6, 341.6, 1106.9 pm
Space Group NameP63/mmc
Space Group Number194

Nuclear Properties
Half-Life1379.375951294 y
Lifetime1991.37493658 y
Decay ModeAlphaEmission
Quantum Numbers6H15/2
Neutron Cross Section710
Neutron Mass AbsorptionN/A
Known Isotopes
235Bk, 236Bk, 237Bk, 238Bk, 239Bk, 240Bk, 241Bk, 242Bk, 243Bk, 244Bk, 245Bk, 246Bk, 247Bk, 248Bk, 249Bk, 250Bk, 251Bk, 252Bk, 253Bk, 254Bk
Stable Isotopes
None
Isotopic Abundances


Notes on the properties of Berkelium:

Atomic Mass: Atomic mass number given for longest lived isotope.

Melting Point: Value given for alpha form.

Up to date, curated data provided by Mathematica's ElementData function from Wolfram Research, Inc.

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