Symbol Bk Atomic radius: pm - Fusion: kJ/Mole -
Name Berkelium Ionic radius: pm (+3)96 Boiling point: C -
Atomic number 97 Electron affinity - Melting point: C 1050
Atomic weight 247.0 1st  ion potential 6.23 Specific Heat Cap: J/(g K) -
Classification Trans metal Natural form Solid Thermal Cond: W/(cm K) -
Configuration [Rn]5f97s2 Crystal structure Hex Electrical Cond -
Oxidation states 3,4 Density 14.8 Abundance: mg/kg-crust Synthetic
Electronegativity - Vaporization: kJ/Mole 310.0    
Berkelium does not occur in nature.  It was discovered in 1949 by Stanley G. Thompson, Albert Ghiorso, and Glenn T. Seaborg at the University of California at Berkeley as a product resulting from the helium-ion bombardment of americium-241. Uses -  no known uses