75 Re Rhenium 186.21
Transition metal
Rhenium 铼
[Xe] 4f¹⁴ 5d⁵ 6s²
- Period 6
- Group 7
- Block d
- Solid
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d⁵ 6s²
Orbital diagram (valence)
- Electrons per shell
- 2, 8, 18, 32, 13, 2
- Unpaired electrons
- 5
- Zeff (Slater)
- 3.60
Properties
- Atomic weight
- 186.21
- Electronegativity (Pauling)
- 1.9
- First ionization energy
- 760.3 kJ/mol
- Electron affinity
- 14.47 kJ/mol
- Covalent radius
- 151 pm
- van der Waals radius
- 217 pm
- Melting point
- 3459 K
- Boiling point
- 5869 K
- Density
- 20.8 g/cm³
- Melting / boiling point
- 3185.8 °C / 5595.9 °C
- Common oxidation states
- +7, +6, +4
- Discovered
- 1925
Periodic trend
Data: PubChem periodic table (public domain); atomic weights are IUPAC abridged standard values; covalent radii from Cordero et al. (2008).