Rh
Rhodium
Transition MetalAtomic Number: 45 • Atomic Mass: 102.9100 u • Period: 5 • Group: 9
Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s¹ 4d⁸
Phase: Solid
Electronegativity: 2.28
Physical & Chemical Properties
Physical Properties
- •Silvery-white, hard, durable noble metal
- •Member of the platinum group
- •Highest reflectivity of all metals
- •Low electrical and thermal resistance
- •High melting point (2237 K or 1964°C)
Melting Point
2237 K (1963.85 °C, 3566.93 °F)
Boiling Point
3968 K (3694.85 °C, 6682.73 °F)
Density
12.41 g/cm³
Electronegativity
2.28 (Pauling scale)
Chemical Properties
- •Multiple oxidation states from +1 to +6, with +3 being most common
- •Extremely resistant to corrosion
- •Insoluble in most acids (dissolves in hot concentrated sulfuric acid)
- •Forms numerous complex compounds, often colored
- •Excellent catalyst for many reactions
Electron Configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s¹ 4d⁸Electron configuration describes how electrons are distributed in atomic orbitals, showing how they are arranged in energy levels and subshells.