Rhodium (Rh) — Element 45: Properties & Data | Aladdin Scientific
Rhodium(Rh) — Element 45
Rhodium (Rh) is a transition metal with atomic number 45 and atomic mass 102.906. It has melting point 2237 K (1964 °C), boiling point 3968 K (3695 °C), density 12.4 g/cm³. It sits in group 9 and period 5 of the periodic table and was discovered in 1803.
Key facts
| Atomic mass | 102.9055 u |
|---|---|
| Electron configuration | [Kr]5s1 4d8 |
| Oxidation states | +3 |
| Electronegativity (Pauling) | 2.28 |
| Atomic radius (van der Waals) | 195 pm |
| Ionization energy | 7.459 eV |
| Electron affinity | 1.137 eV |
| Melting point | 2237 K |
| Boiling point | 3968 K |
| Density | 12.4 g/cm³ |
| Standard state | Solid |
| Year discovered | 1803 |
Frequently asked questions
What is the electron configuration of rhodium?
The ground-state electron configuration of rhodium is [Kr]5s1 4d8.
What group and period is rhodium in?
Rhodium (Rh) is in group 9 and period 5 of the periodic table, classified as a transition metal.
What is the melting point of rhodium?
Rhodium melts at 2237 K (1964 °C).
What is the standard state of rhodium?
Rhodium is a solid at standard temperature and pressure.
Related elements
About this data: property values compiled from IUPAC Standard Atomic Weights (2021), the NIST Atomic Spectra Database, and PubChem. Curated by the Aladdin Scientific technical team. Last reviewed: .