Thorium
Symbol: Th
Atomic Number: 90
Atomic Weight: 232.0381
Boiling Point: 5060 K
Melting Point: 2028 K
Density at 300K: 11.72 g/cm3
Covalent radius: 1.65
Atomic radius: ???
Atomic volume: 19.90 cm3/mol
First ionization potental: 6.08 V
Specific heat capacity: 0.113 Jg-1K-1
Thermal conductivity: 54 Wm-1K-1
Electrical conductivity: 7.1*106Ω-1m-1
Heat of fusion: 15.65 kJ/mol
Heat of vaporization: 543.92 kJ/mol
Electronegativity: 1.3 (Pauling's)

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