Rhenium (Re)
Rhenium (Re) is element 75 of the periodic table, a transition metal in period 6 and group 7. Its standard atomic weight is 186.207, so one mole of rhenium atoms has a mass of 186.207 g. At room temperature it is a solid; it melts at 3185.85 °C and boils at 5595.85 °C.
| Atomic number | 75 |
|---|---|
| Symbol | Re |
| Standard atomic weight | 186.207 |
| Molar mass | 186.207 g/mol |
| Category | Transition metal |
| Group | 7 |
| Period | 6 |
| Block | d-block |
| Electron configuration | [Xe] 6s2 4f14 5d5 |
| Oxidation states | +7, +6, +4 |
| Electronegativity (Pauling) | 1.9 |
| Atomic radius (van der Waals) | 217 pm |
| First ionisation energy | 7.88 eV (760.3 kJ/mol) |
| Electron affinity | 0.15 eV |
| State at room temperature | Solid |
| Melting point | 3459 K (3185.85 °C) |
| Boiling point | 5869 K (5595.85 °C) |
| Density | 20.8 g/cm³ |
| Discovered | 1925 |
Group 7
Calculate with Rhenium
Atomic weight: IUPAC CIAAW standard atomic weight. Other properties: PubChem (U.S. National Library of Medicine, public domain). Values such as melting point and radius depend on how they were measured; check a data book for precise work.