75ReRhenium186.2071[Xe] 4f¹⁴ 5d⁵ 6s²
transition metal
Rhenium
Rhenium is a chemical element with symbol Re and atomic number 75. It is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. With an estimated average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's crust.
A stylized shell model. Electrons are quantum objects, not particles following these literal paths. Sizes and motion are illustrative.
Electrons by shell
Electron configuration
4f14
5d5
6s2
54 is the [Xe] core total across five shells.
At a glance
- Atomic number
- 75
- Atomic mass
- 186.2071 u
- Phase
- Solid
- Density
- 21.02 g/cm³
- Melting point
- 3,459 K
- Boiling point
- 5,869 K
- First ionization energy
- 760 kJ/mol
- Electronegativity
- 1.9
- Electron affinity
- 5.8273 kJ/mol
- Molar heat capacity
- 25.48 J/(mol·K)
- Period
- 6
- Appearance
- silvery-grayish
Conditions and isotopes affect measured properties. Some properties of short-lived elements are predicted. Electronegativity uses the Pauling scale.
Keep exploring
Explore the stories, imagery, and reference data in more depth. Properties with no value in the reference are marked unavailable.