118 Og
Unknown / predicted
Oganesson
Heaviest known element.
Properties of Oganesson
- Atomic number (Z)
- 118
- Symbol
- Og
- Atomic mass
- 294 g/mol
- Category
- Unknown / predicted
- Group
- 18
- Period
- 7
- Electron configuration
- [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶
- Electronegativity (Pauling)
- —
- Atomic radius
- —
- First ionization energy
- 839 kJ/mol
- Melting point
- 325 K (51.9 °C)
- Boiling point
- 450 K (176.9 °C)
- Density
- 7 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 2002
Frequently asked questions
What is Oganesson?
Oganesson (Og) is an unknown / predicted, element number 118 on the periodic table. Heaviest known element.
What is the atomic number and atomic mass of Oganesson?
Oganesson has atomic number 118 and an atomic mass of about 294 g/mol.
What is the electron configuration of Oganesson?
The electron configuration of Oganesson is [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶.
Where is Oganesson on the periodic table?
Oganesson sits in group 18, period 7, and is classified as a unknown / predicted.