118
Og
294
Oganesson (Og)
Element 118 · Period 7 · Group 18
noble-gas
solid at room temp
p-block
radioactive
synthetic
About Oganesson
Heaviest known element. Named after living physicist Yuri Oganessian. Predicted to be a solid at STP.
Physical Properties
Atomic Mass
294 u
State at 25°C
Solid
Melting Point
325 °C
Boiling Point
450 °C
Density
5.0 g/cm³
Magnetism
Unknown
Atomic Properties
Electron Configuration
[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶
Electron Shells
2, 8, 18, 32, 32, 18, 8
Oxidation States
0, +2, +4
Discovery & History
Discovered By
Joint Institute for Nuclear Research
Discovery Year
2002
Named By
IUPAC
Name origin: Yuri Oganessian (nuclear physicist)
Frequently Asked Questions
- Is Oganesson a metal, nonmetal, or metalloid?
- Oganesson is classified as a noble-gas.
- What state is Oganesson in at room temperature?
- Oganesson is a solid at standard room temperature (25°C).
- What is the atomic mass of Oganesson?
- Oganesson has an atomic mass of 294 atomic mass units (u).
- Who discovered Oganesson?
- Oganesson was discovered by Joint Institute for Nuclear Research in 2002.
- Where is Oganesson on the periodic table?
- Oganesson is element number 118, located in period 7 and group 18.