Oganesson (Og) is a chemical element belonging to the category Noble gas, with atomic number 118 and atomic mass 294.0000 u. This sheet describes its fundamental properties, periodic position and physical characteristics.
Identity
- Name: Oganesson
- Symbol: Og
- Atomic number: 118
- Atomic mass: 294.0000 u
Position in the periodic table
- Group: 18
- Period: 7
- Category: Noble gas
Physico-chemical properties
- Standard state: Unknown (synthetic element; theoretical studies suggest a solid at room temperature)
- Melting point: Not experimentally measured (predicted to be much higher than for lighter noble gases)
- Density: Not experimentally measured (predicted to be very high)
- Electron configuration: [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶
Scientific description
Oganesson is a chemical element with symbol Og and atomic number 118. It belongs to the category of noble gases and occupies group 18 and period 7. Its standard atomic mass is 294.0000 u. Because only a few atoms have ever been produced, its macroscopic physical properties remain experimentally unknown and are inferred from theoretical calculations.