Berkelium

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97

Bk

247.1
Physical Properties
Color silvery
Phase at Room Temp. solid
Density (g/cm3) 14.78
Hardness (Mohs) ---
Melting Point (K) 1259.2
Boiling Point (K) ---
Heat of Fusion (kJ/mol) ---
Heat of Vaporization (kJ/mol) ---
Heat of Atomization (kJ/mol) ---
Thermal Conductivity (J/m sec K) ---
Electrical Conductivity (1/mohm cm) ---
Source Synthetic
Atomic Properties
Electron Configuration [Rn]7s25f9
Number of Isotopes 23 (0 natural)
Electron Affinity (kJ/mol) ---
First Ionization Energy (kJ/mol) 601
Second Ionization Energy (kJ/mol) ---
Third Ionization Energy (kJ/mol) ---
Electronegativity 1.3
Polarizability (Å3) 22.7
Atomic Weight 247.1
Atomic Volume (cm3/mol) 16.7
Ionic Radius2- (pm) ---
Ionic Radius1- (pm) ---
Atomic Radius (pm) 170
Ionic Radius1+ (pm) ---
Ionic Radius2+ (pm) ---
Ionic Radius3+ (pm) 110
Common Oxidation Numbers +3
Other Oxid. Numbers +4
Abundance
In Earth's Crust (mg/kg) ---
In Earth's Ocean (mg/L) ---
In Human Body (%) ---
Regulatory / Health
CAS Number 7440-40-6
OSHA Permissible Exposure Limit (PEL) No limits
OSHA PEL Vacated 1989 No limits
NIOSH Recommended Exposure Limit (REL) No limits
Sources:
University of Wisconsin General Chemistry
Mineral Information Institute
Jefferson Accelerator Laboratory
EnvironmentalChemistry.com
 
Glossary

Citation

(2006). Berkelium. Retrieved from http://www.eoearth.org/view/article/51cbed0f7896bb431f68f6b9

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