Electronic data		Thermal data		Steric 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: --

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

Legend

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.