76Os
Element 76
Osmium
Transition metals
Osmium (from Greek osme (ὀσμή) meaning "smell") is a chemical element with symbol Os and atomic number 76.
Key data
- Atomic number
- 76
- Atomic mass
- 190.233 u
- Group / Period
- 8 / 6
- Block
- d-block
- Phase at STP
- Solid
- Density
- 22.59 g/cm³
- Melting point
- 3032.8 °C
- Boiling point
- 5011.9 °C
- Electron configuration
- [Xe] 4f14 5d6 6s2
Common uses
- •Densest natural element
- •Pen-tip alloys
- •Electrical contacts
Discovery
Year: 1803
Discovered by: Smithson Tennant
Frequently asked questions
What is the atomic number of Osmium?
Osmium has atomic number 76. Its symbol is Os and its atomic mass is 190.233 u.
What category of element is Osmium?
Osmium is classified as transition metals. It sits in group 8, period 6 of the periodic table.
What is Osmium used for?
Common uses of Osmium include: Densest natural element, Pen-tip alloys, Electrical contacts.
When was Osmium discovered?
Osmium was discovered in 1803 by Smithson Tennant.
Play the game
Test your knowledge in The Lab
20-round element ID, cryptic 3-clue guesser, and an interactive periodic table.
Open The Lab →