Curium

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96

Cm

247.1
Physical Properties
Color silvery-white
Phase at Room Temp. solid
Density (g/cm3) 13.51
Hardness (Mohs) ---
Melting Point (K) 1613.2
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]7s25f76d1
Number of Isotopes 23 (0 natural)
Electron Affinity (kJ/mol) ---
First Ionization Energy (kJ/mol) 581
Second Ionization Energy (kJ/mol) ---
Third Ionization Energy (kJ/mol) ---
Electronegativity 1.3
Polarizability (Å3) 23
Atomic Weight 247.1
Atomic Volume (cm3/mol) 18.3
Ionic Radius2- (pm) ---
Ionic Radius1- (pm) ---
Atomic Radius (pm) 174
Ionic Radius1+ (pm) ---
Ionic Radius2+ (pm) ---
Ionic Radius3+ (pm) 111
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 7440-51-9
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

(2008). Curium. Retrieved from http://www.eoearth.org/view/article/51cbed5c7896bb431f691b63

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