Oganesson (Og)
Oganesson
Oganesson (Og) is an element with unknown chemical properties in period 7, group 18. Its relative atomic mass is [294] and the molar mass of the atom is [294] g/mol.
Atomic number 118
Atomic mass [294] predicted
Molar mass [294] g/mol
Category Unknown properties Unknown
Properties of oganesson
| Atomic number | 118 |
|---|---|
| Symbol | Og |
| Latin name | Oganesson |
| Relative atomic mass | [294] |
| Molar mass | [294] g/mol |
| Group, period, block | 18, 7, p |
| Category | Unknown properties |
| State at 20 °C | Unknown |
| Electron configuration | [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶ |
| Discovered | 2002, JINR (Dubna) and LLNL (USA) |
Electron configuration of oganesson
Electrons per shell
K2L8M18N32O32P18Q8
Full notation
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 5f¹⁴ 6s² 6p⁶ 6d¹⁰ 7s² 7p⁶
Noble-gas notation
118 protons · 118 electrons[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶
Formula and compounds of oganesson
Simple substanceOgoganessonMolar mass of Og: [294] g/mol
No stable compounds — only a few atoms have ever been made.
Interesting facts about oganesson
- 1The heaviest known element — only a handful of atoms have ever been made.
- 2Its half-life is under 1 millisecond.
- 3Named after physicist Yuri Oganessian — one of only two elements named after a living person.
Uses of oganesson
- Basic research into nuclear structure only
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Frequently asked questions
The relative atomic mass of oganesson is [294], so the molar mass of the atom is [294] g/mol.
Full: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 5f¹⁴ 6s² 6p⁶ 6d¹⁰ 7s² 7p⁶. Noble-gas notation: [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶.