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.