Berkelium

Metal

synthetic

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

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Electronic 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: --

Thermal data

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

Steric data

Atomic radius: -- Å
Ionic radius: -- Å
Covalent radius: -- Å
Atomic volume: -- cm³/mol
Density (293 K): -- g/cm³
Crystal structure: --

Nuclide	Mass	Spin	Halflife	Decay mode	Decay tree
²⁴²Bk	242	0	7m	EC, β+	View
²⁴⁴Bk	244	1	4.4h	EC, α	View
²⁴⁵Bk	245	3/2	4.94d	EC, α	View
²⁴⁷Bk	247.07	3/2	1.4E03y	α	View
²⁴⁹Bk	249	7/2	320d	β-, α, SF	View
²⁵⁰Bk	250	2	3.217h	β-	View
²⁵¹Bk	251	3/2	56m	β-	View

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.

Berkelium

Physical data

Electronic data

Thermal data

Steric data

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