Osmium (Os) — Transition metal. Atomic number 76.
Bluish-white metal
- Atomic number: 76
- Symbol: Os
- Atomic mass: 190.23 u
- Category: Transition metal
- State: Solid
- Melting point: 3032.85 °C / 3306 K
- Boiling point: 5011.85 °C / 5285 K
- Density: 22.59 g/cm³ (20°C)
- Electron configuration: [Xe] 4f14 5d6 6s2
- Oxidation states: +2, +3, +4, +6, +8
- Electronegativity: 2.2
- Discovered by: Smithson Tennant (1803)
Common uses: Electrical contacts, Fountain pen tips, Catalysts
Biological role: No biological role.
Frequently Asked Questions about Osmium
What is the atomic number of osmium?
Osmium has an atomic number of 76, meaning each atom contains 76 protons in its nucleus.
What is the atomic mass of osmium?
The standard atomic weight of osmium is 190.23 u (unified atomic mass units).
What category does osmium belong to?
Osmium is classified as a transition metal.
What is the state of osmium at room temperature?
Osmium is a solid at 20 °C (68 °F).
What is the melting point of osmium?
The melting point of osmium is 3032.85 °C / 3306 K.
What is the boiling point of osmium?
The boiling point of osmium is 5011.85 °C / 5285 K.
What is the density of osmium?
The density of osmium is 22.59 g/cm³ (20°C).
What is the electronegativity of osmium?
Osmium has a Pauling electronegativity of 2.2.
What is the electron configuration of osmium?
The electron configuration of osmium is [Xe] 4f14 5d6 6s2.
What are the common oxidation states of osmium?
Osmium commonly exhibits the following oxidation states: +2, +3, +4, +6, +8.
When was osmium discovered?
Osmium was discovered in 1803 by Smithson Tennant.
Is osmium radioactive?
Osmium is a stable element with no naturally occurring radioactive isotopes.
What is the biological role of osmium?
No biological role.
What are the common uses of osmium?
Osmium is used for: Electrical contacts; Fountain pen tips; Catalysts.
