45RhRhodium102.905502[Kr] 4d⁸ 5s¹
transition metal
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.
A stylized shell model. Electrons are quantum objects, not particles following these literal paths. Sizes and motion are illustrative.
Electrons by shell
Electron configuration
4d8
5s1
36 is the [Kr] core total across four shells.
At a glance
- Atomic number
- 45
- Atomic mass
- 102.905502 u
- Phase
- Solid
- Density
- 12.41 g/cm³
- Melting point
- 2,237 K
- Boiling point
- 3,968 K
- First ionization energy
- 719.7 kJ/mol
- Electronegativity
- 2.28
- Electron affinity
- 110.27 kJ/mol
- Molar heat capacity
- 24.98 J/(mol·K)
- Period
- 5
- Appearance
- silvery white metallic
Conditions and isotopes affect measured properties. Some properties of short-lived elements are predicted. Electronegativity uses the Pauling scale.
Keep exploring
Explore the stories, imagery, and reference data in more depth. Properties with no value in the reference are marked unavailable.