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118Og294
Oganesson
Noble gasesBlock pPeriod 7Group 18unknown at 20 °C
- Configuration :
- [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶
- Atomic mass :
- 294 u
Predicted propertiesMany physical properties of this element are theoretical calculated values, not experimental measurements. Transactinides (Z ≥ 104) are only synthesized as a few atoms with very short half-lives. Source: IUPAC 2021.
3D Bohr-model representation of the Oganesson atom (symbol Og, atomic number Z=118). Electron shell configuration: 2, 8, 18, 32, 32, 18, 8 electrons.
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Bohr model · educational
Electron configuration
Full1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 4f¹⁴ 5d¹⁰ 6s² 6p⁶ 5f¹⁴ 6d¹⁰ 7s² 7p⁶
Short[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶
Valence electrons8
KLMNOPQ shells
K2
L8
M18
N32
O32
P18
Q8
Electronegativity
Pauling—
Allen—
Mulliken (eV)—
Atomic radii
Empirical—
Calculated—
Covalent—
Van der Waals—
Successive ionisation energies
I₁860.1 kJ/mol
Electron affinity—
Oxidation states
-10+1+2+4+6
Bold states = most common.