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Berkelium

Metal radioactivesynthetic
Symbol: Bk
Atomic number: 97
Atomic mass: (247.0703)
Group: Actinide
CAS-number: 7440-40-6

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Physical data
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Physical data

Electronic dataThermal dataSteric data
Shells: 2, 8, 18, 32, 26, 9, 2
Orbitals: [Rn] 5f9 7s2
Electronegativity: --, 1.2
1. Ionization potential: 6.23 eV
2. Ionization potential: -- eV
3. Ionization potential: -- eV
Oxidation states: 4, 3
Electrical conductivity: --
Melting point: -- °C
Boiling point: -- °C
Specific heat: -- J/gK
Heat of fusion: -- kJ/mol
Heat of vaporization: -- kJ/mol
Thermal conductivity: 0.1 W/cmK
Atomic radius: -- Å
Ionic radius: -- Å
Covalent radius: -- Å
Atomic volume: -- cm³/mol
Density (293 K): -- g/cm³
Crystal structure: --

Isotopes

NuclideAbundance [%]MassSpinHalflifeDecay modeDecay tree
242Bk 0 242 0 7m EC, β+ View
244Bk 0 244 1 4.4h EC, α View
245Bk 0 245 3/2 4.94d EC, α View
247Bk 0 247.07 3/2 1.4E03y α View
249Bk 0 249 7/2 320d β-, α, SF View
250Bk 0 250 2 3.217h β- View
251Bk 0 251 3/2 56m β- View

Other info

Name origin:Named after Berkeley, California, the city of its discovery.
Description:Synthetic radioactive metal.
Discovered by:G.T.Seaborg, S.G.Tompson, A.Ghiorso
Year:1949
Place:United States
Sources:Some compounds have been made and studied. Made by bombarding americium with alpha particles.
Use(s):It has no significant commercial applications.