118Og[294]
Oganesson
Unknown propertiesSuper-heavy elements made in labs a few atoms at a time. Their chemistry is still being studied.
[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶
- Atomic number
- 118
- Atomic mass
- [294]
- Protons
- 118
- Neutrons
- 176
- Electrons
- 118
- Shells
- 2, 8, 18, 32, 32, 18, 8
- State at 25 °C
- Unknown
- Position
- Group 18, period 7
Proton (+)Neutron (0)Electron (−)
Discovered byDubna with Lawrence Livermore, 2002Yuri Oganessian: 5 elements
Named after Yuri Oganessian, who led the search for super-heavy elements.
Did you know?
- It's the heaviest element known, and only a handful of atoms have ever been made.
- It sits with the noble gases, but it may not behave like one.
Where it's found
- Made only in laboratories, a few atoms at a time
What it's used for
- Scientific research only
Try it
There's no safe home experiment for Oganesson. Explore it with the animated atom above instead.