Rhenium
Symbol
Re
Atomic Number
75
Atomic Weight
186.207
Element Classification
Discovered By
Walter Noddack, Ida Tacke, Otto Berg
Discovery Date
1925 (Germany)
Name Origin
Latin: Rhenus, the Rhine River.
Density (g/cc)
21.02
Melting Point (K)
3453
Boiling Point (K)
5900
Appearance
Dense, silvery-white metal
Atomic Radius (pm)
137
Atomic Volume (cc/mol)
8.85
Covalent Radius (pm)
128
Ionic Radius
53 (+7e) 72 (+4e)
Specific Heat
0.138
Fusion Heat (kJ/mol)
34
Evaporation Heat (kJ/mol)
704
Thermal Conductivity (@25°C W/m K)
48.0
Debye Temperature (K)
416.00
Pauling Negativity Number
1.9
First Ionizing Energy (kJ/mol)
759.1
Oxidation States
5, 4, 3, 2, -1
Electronic Configuration
[Xe] 4f14 5d5 6s2
Lattice Structure
Hexagonal(HEX)
Lattice Constant
2.760
Lattice C/A Ratio
1.615
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