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97Bk247.000
Berkelium
ActinideBerkelium is a transuranic radioactive chemical element with symbol Bk and atomic number 97. It is a member of the actinide and transuranium element series. It is named after the city of Berkeley, California, the location of the University of California Radiation Laboratory where it was discovered in December 1949.
Phase: SolidAppearance: silvery
2, 8, 18, 32, 27, 8, 2
Physical Properties
Atomic Mass247 u
Density14.78 g/cm³
Melting Point1259 K
Boiling Point2900 K
Period7
PhaseSolid
Chemical Properties
Electron Configuration1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f9
Semantic Config[Rn] 5f9 7s2
Shells2, 8, 18, 32, 27, 8, 2
Electron Affinity-165.24 kJ/mol
Electronegativity1.3
Ionization Energies
IE1: 601 kJ/mol
Discovery
Discovered byLawrence Berkeley National Laboratory