Oganesson
unknown, predicted to be noble gas · period 7 · group 18 (noble gases) · p-block
Oganesson is a synthetic chemical element with the symbol Og and atomic number 118. It was first synthesized in 2002 at the Joint Institute for Nuclear Research (JINR) in Dubna, near Moscow, Russia, by a joint team of Russian and American scientists.
What the numbers say
At standard temperature and pressure Oganesson is a solid, sitting in period 7, group 18 of the p-block.
First identified in 2006.
Check it against computed structures
The structure search queries the Materials Project, OQMD and the Open Materials Database for computed crystal structures containing Og — with DFT formation energy, hull stability and band gap where the provider publishes them.
K 2 · L 8 · M 18 · N 32 · O 32 · P 18 · Q 8
Properties
| Atomic number | 118 |
|---|---|
| Atomic mass | 294 u |
| Series | unknown, predicted to be noble gas |
| Group | 18 |
| Period | 7 |
| Block | p-block |
| Phase at STP | Solid |
| Boiling point | 350 K (77 °C) |
| Electron configuration | *[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶ |
| Discovered | 2006 |
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See Og in context with all 118 elements.
Working with oganesson in a real design?
Ask the materials chat how Og behaves in your alloy system, what it does to weldability, and which grades to look at — with the source of every number named.