Rhenium (Re) — Transition metal. Atomic number 75.
Silvery-gray metal
- Atomic number: 75
- Symbol: Re
- Atomic mass: 186.21 u
- Category: Transition metal
- State: Solid
- Melting point: 3185.85 °C / 3459 K
- Boiling point: 5595.85 °C / 5869 K
- Density: 21.02 g/cm³ (20°C)
- Electron configuration: [Xe] 4f14 5d5 6s2
- Oxidation states: +4, +6, +7
- Electronegativity: 1.9
- Discovered by: Walter Noddack, Ida Noddack, Otto Berg (1925)
Common uses: Jet engines, Catalysts, Thermocouples
Biological role: No known biological role.
Frequently Asked Questions about Rhenium
What is the atomic number of rhenium?
Rhenium has an atomic number of 75, meaning each atom contains 75 protons in its nucleus.
What is the atomic mass of rhenium?
The standard atomic weight of rhenium is 186.21 u (unified atomic mass units).
What category does rhenium belong to?
Rhenium is classified as a transition metal.
What is the state of rhenium at room temperature?
Rhenium is a solid at 20 °C (68 °F).
What is the melting point of rhenium?
The melting point of rhenium is 3185.85 °C / 3459 K.
What is the boiling point of rhenium?
The boiling point of rhenium is 5595.85 °C / 5869 K.
What is the density of rhenium?
The density of rhenium is 21.02 g/cm³ (20°C).
What is the electronegativity of rhenium?
Rhenium has a Pauling electronegativity of 1.9.
What is the electron configuration of rhenium?
The electron configuration of rhenium is [Xe] 4f14 5d5 6s2.
What are the common oxidation states of rhenium?
Rhenium commonly exhibits the following oxidation states: +4, +6, +7.
When was rhenium discovered?
Rhenium was discovered in 1925 by Walter Noddack, Ida Noddack, Otto Berg.
Is rhenium radioactive?
Rhenium is a stable element with no naturally occurring radioactive isotopes.
What is the biological role of rhenium?
No known biological role.
What are the common uses of rhenium?
Rhenium is used for: Jet engines; Catalysts; Thermocouples.
