Chemical element · Atomic number 118
Oganesson
Oganesson in the periodic table: atomic number 118, electron configuration, atomic mass, physical data, oxidation states, media credit and visible sources.
Noble gas
expected to be gaseous
[295.216] u
A locally stored, license-verified sample photograph has not been curated yet.
Atomic classification
Shell occupancy
Oganesson in the Bohr shell model
This shows the electron distribution of the neutral atom in a simplified shell model.
- K · n=1
- 2 electrons
- L · n=2
- 8 electrons
- M · n=3
- 18 electrons
- N · n=4
- 32 electrons
- O · n=5
- 32 electrons
- P · n=6
- 18 electrons
- Q · n=7
- 8 electrons
- Electron configuration
- [Rn]7s2 7p6 5f14 6d10 (predicted)
- Electrons per shell
- 2 · 8 · 18 · 32 · 32 · 18 · 8
- Group
- 18
- Period
- 7
- Block
- P
- Element category
- Noble gas
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Physical and chemical properties
- Atomic mass
- [295.216] u
- Standard state
- expected to be gaseous
- Density
- not reported
- Melting point
- not reported
- Boiling point
- not reported
- Electronegativity
- not reported
- First ionisation energy
- not reported
- Oxidation states
- +6, +4, +2, +1, 0, -1
- Discovery
- 2006
Safety and periodic classification
Safety
Safe handling cannot be inferred from Oganesson's position in the periodic table alone. Laboratory, classroom and disposal decisions must follow the documentation for the exact material and its safety data sheet.
Position and comparison
Oganesson is in period 7, group 18 and the P block. Its direct predecessor by atomic number is Tennessine. The snapshot does not report a Pauling electronegativity. Periodic trends are compared only through the separately sourced neighbouring values.
Sources and scope
PubChem attributes element data to sources including IUPAC, NIST and IAEA. Quanta stores the referenced snapshot locally and leaves unknown values unavailable.