45Rh102.91
Rhodium (Rh)
Element 45 Ā· Transition metal
Rhodium (Rh) is a chemical element with atomic number 45. It is classified as a transition metal in period 5, group 9 of the periodic table (the d-block). Its standard atomic weight is 102.91 u and its ground-state electron configuration is [Kr] 4dāø 5sĀ¹.
Rhodium facts
| Atomic number (Z) | 45 |
|---|---|
| Symbol | Rh |
| Standard atomic weight | 102.91 u |
| Category | Transition metal |
| Group | 9 |
| Period | 5 |
| Block | d-block |
| Electron configuration | [Kr] 4dāø 5sĀ¹ |
| Electronegativity (Pauling) | 2.28 |
| State at 20 Ā°C | Solid |
| Protons / electrons | 45 / 45 |
| Neutrons (most common isotope, approx.) | 58 |
| Molar mass | 102.91 g/mol |