Rhodium
Symbol
Rh
Atomic Number
45
Atomic Weight
102.9055
Element Classification
Discovered By
William Wollaston
Discovery Date
1803 (England)
Name Origin
Greek: rhodon (rose). Its salts give a rosy solution.
Density (g/cc)
12.41
Melting Point (K)
2239
Boiling Point (K)
4000
Appearance
Silvery white, hard metal
Atomic Radius (pm)
134
Atomic Volume (cc/mol)
8.3
Covalent Radius (pm)
125
Ionic Radius
68 (+3e)
Specific Heat
0.244
Fusion Heat (kJ/mol)
21.8
Evaporation Heat (kJ/mol)
494
Thermal Conductivity (@25°C W/m K)
150
Debye Temperature (K)
n/a
Pauling Negativity Number
2.28
First Ionizing Energy (kJ/mol)
719.5
Oxidation States
5, 4, 3, 2, 1, 0
Electronic Configuration
[Kr] 4d8 5s1
Lattice Structure
Face-Centered Cubic(FCC)
Lattice Constant
3.800
Lattice C/A Ratio
n/a
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