45Solid
Rh 102.906 Atomic mass · uTransition metals
Rhodium
Rhodium is a chemical element with symbol Rh and atomic number 45. It is a rare, silvery-white, hard, and chemically inert transition metal. It is a member of the platinum group.
Discovery 1803 (William Hyde Wollaston)
K2L8M18N16O1
Physical properties
Values for the element in its standard state.
- Density
- 12.45g/cm³
- Melting point
- 2,237K
- Boiling point
- 3,968K
- Atomic radius
- 135pm
- Bonding type
- Metallic
- Molar heat
- 24.98J/(mol·K)
Inside the atom
Electron arrangement and the energy behind its behavior.
Full electron configuration
1s, 2 electrons; 2s, 2 electrons; 2p, 6 electrons; 3s, 2 electrons; 3p, 6 electrons; 3d, 10 electrons; 4s, 2 electrons; 4p, 6 electrons; 4d, 8 electrons; 5s, 1 electrons;
[Kr] represents 36 core electrons. The full view shows them explicitly.
45 electrons Orbital order preserved from source
- Electronegativity
- 2.28Pauling scale
- First ionization energy
- 720kJ/mol
- Electron affinity
- 110kJ/mol
- Van der Waals radius
- Not available
Rh RhodiumAtomic number 45
720kJ/mol
Atomic numberGaps indicate unavailable data
About rhodium
- Appearance
- Silvery white metallic
- Discovery
- 1803 (William Hyde Wollaston)
- Data source
- Read the reference
A missing value means it is unavailable in this reference dataset. Values can vary with measurement method and conditions.