Periodic Table

Oganesson

Unknown

Quick Facts about Oganesson

Ts
  • solid- state of matter at room temperature
  • Radioactive- no stable isotopes exist
  • +6, +4, +2, +1, 0, -1- common oxidation states in compounds

Oganesson (Og) is element 118 on the periodic table. Atomic mass of Og: 294.0000 u. Og is in period 7, group 18. Melting point of Og: 325.00 K.Density of Og: 4.90 g/cm³.

Why Oganesson Matters

Oganesson in everyday life and industry

In Your Home

  • No commercial applications
  • Heaviest element ever created
  • Only 5 or 6 atoms ever made
  • Completes the seventh period

In Your Body

✗ Not essential

No biological role. Too unstable for any studies. Half-life under 1 millisecond.

Safety: Oganesson is radioactive

Discovery of Oganesson

Discovered by Joint Institute for Nuclear Research in Russia, 2002

Name origin: Named in honor of the scientist Yuri Oganessian.

History & Events

2006
Named after Yuri Oganessian
2006
Oganessian led superheavy element research at JINR
2006
Second element named after a living person
2002
Discovered at JINR Dubna in 2002

About Oganesson

Named after Yuri Oganessian; heaviest known element; possibly a solid noble gas.

Atomic Properties of Og

Atomic Number of Og
118
Atomic Mass of Og
294.0000 u
Electron Configuration
[Rn] 5f14 6d10 7s2 7p6
Electronegativity
Block
p-block
Group
18
Period
7

Physical Properties of Og

Phase (STP)
solid
Melting Point of Og
325.00 K
Boiling Point of Og
450.00 K
Density of Og
4.9000 g/cm3

Atomic Radii

Covalent
157 pm

Common Misconceptions

Wrong:Oganesson is a noble gas like argon or xenon.
Correct:Oganesson might not be a typical noble gas—extreme relativistic effects could make it reactive or even metallic.
Wrong:All noble gases are gaseous at room temperature.
Correct:Oganesson might be a solid or even reactive due to relativistic effects drastically altering its electron shell structure.
Wrong:No living scientists have elements named after them.
Correct:Yuri Oganessian (born 1933) is the second living person to have an element named in his honor, after Glenn Seaborg.

Isotopes of Oganesson

Oganesson has 0 naturally occurring isotopes, plus 1 notable radioactive isotope.

IsotopeAtomic Mass (u)AbundanceHalf-LifeDecay Mode
294118Og (Og-294)Oganesson-294 isotope0%0.7 msα, spontaneous fission

Data source: NIH PubChem (aggregated from IUPAC, NIST)

Sources

Made by bombarding californium-249 with calcium-48.

Geochemistry

Goldschmidt
synthetic

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