118 Og 294
Oganesson
Noble Gas
Oganesson (Og) is a chemical element with atomic number 118, classified as a noble gas. At room temperature it is a gas. It was discovered in 2002 by JINR / Lawrence Livermore.
Properties
- Atomic number
- 118
- Atomic mass
- 294 u
- Category
- Noble Gas
- Group
- 18
- Period
- 7
- Block
- p-block
- Electron configuration
- [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶
- Phase at STP
- Gas
- Density
- 5 g/L
- Melting point
- —
- Boiling point
- 350 K (76.9 °C)
- Electronegativity
- —
- Atomic radius
- —
- Ionization energy
- —
- Discovery
- 2002 · JINR / Lawrence Livermore
Common uses
Research only
Did you know?
Heaviest known element and may not behave like a typical noble gas.
Experiment with the elements
Oganesson doesn't form any compounds in our lab yet, but the periodic table sandbox lets you combine dozens of other real elements into real compounds — water, table salt, ammonia and many more — with their true chemical formulas.