Periodic table / Transition metals
75Rhenium
Rhenium is a transition metal in group 7, period 6. At 25 °C it is a solid.
- Symbol
- Re
- Atomic number
- 75 protons in the nucleus
- Standard atomic weight
- 186.21 ± 0.01
- Electron configuration
- [Xe] 4f14 5d5 6s2
- Electrons in each shell
- 2, 8, 18, 32, 13, 2
- Group, period, block
- 7, 6, d
- Family
- Transition metals
- State at 25 °C
- solid
- Electronegativity
- 1.9 (Pauling scale)
- First ionisation energy
- 755.8 kJ/mol (7.83352 eV)
Where these numbers come from
Atomic weight: IUPAC CIAAW, abridged standard atomic weights 2024. Electron configuration and ionisation energy: NIST Atomic Spectra Database. Family, state and electronegativity: PubChem. See Sources. Melting points, boiling points and densities are left out for now: published values differ between sources, and we will add them once each has been checked.