Uranium
Symbol
U
Atomic Number
92
Atomic Weight
238.0289
Element Classification
Discovered By
Martin Klaproth
Discovery Date
1789 (Germany)
Name Origin
Named for the planet Uranus.
Density (g/cc)
19.05
Melting Point (K)
1405.5
Boiling Point (K)
4018
Appearance
Silvery-white, dense, ductile and malleable, radioactive metal.
Atomic Radius (pm)
138
Atomic Volume (cc/mol)
12.5
Covalent Radius (pm)
142
Ionic Radius
80 (+6e) 97 (+4e)
Specific Heat
0.115
Fusion Heat (kJ/mol)
12.6
Evaporation Heat (kJ/mol)
417
Thermal Conductivity (@25°C W/m K)
27.5
Debye Temperature (K)
n/a
Pauling Negativity Number
1.38
First Ionizing Energy (kJ/mol)
686.4
Oxidation States
6, 5, 4, 3
Electronic Configuration
[Rn] 5f3 6d1 7s2
Lattice Structure
Orthorhombic(ORC)
Lattice Constant
2.850
Lattice C/A Ratio
n/a
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