Rhodium was discovered by English chemist and physicist William Hyde Wollaston (1766-1828) in about 1803. The origin of the name comes from the Greek word rhodon meaning rose.
Name: Rhodium
Symbol: Rh
Atomic number: 45
Atomic weight: 102.91
State: solid
Group, period, block: 9, 5, d
Color: silvery white metallic
Classification: transition metal
Electron configuration: 4s1 4d8
2,8,18,16,1
Physical properties
Density: 12.41 g/cm-3
Melting point: 2237 K,1964 �C,3567 �F
Boiling point: 3968 K,3695 �C,6683 �F
Atomic properties
Oxidation states: 6, 5, 4, 3, 2, 1[1], -1
Electronegativity: 2.28 (Pauling scale)
Ionization energies: 1st: 719.7 kJ�mol-1
Covalent radius: 142�7 pm
Van der Waals radius: no data
- Rh
- 01
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Electron Configuration
Isotopes
There is one naturally occurring isotope of rhodium exists, 103Rh.