Og
294.000Oganesson
Oganesson
Oganesson is the heaviest known element, with atomic number 118. It completes period 7, honors Yuri Oganessian, and is predicted to differ strongly from lighter noble gases because of relativistic effects.
118
294 g/mol
[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶
2 | 8 | 18 | 32 | 32 | 18 | 8
—
4.95 g/cm³
51.85 °C
176.9 °C
Joint Institute for Nuclear Research
Oganesson was first synthesized in 2002 by JINR Dubna and Lawrence Livermore using californium targets and calcium-48 ions. IUPAC approved the name in 2016 to honor Yuri Oganessian, a pioneer of superheavy element research.
Oganesson-294
Half-life: About 0.7-0.9 milliseconds. Only confirmed oganesson isotope in common references; decays by alpha emission toward livermorium.- Research on the heaviest known nuclei
- Theoretical chemistry of the end of period 7
- Relativistic studies of noble-gas-group behavior
- Guidance for searches beyond element 118
Oganesson has no biological role. Only a few atoms have been produced, and oganesson-294 decays in roughly millisecond or sub-millisecond time scales.
- Oganesson completes the seventh period of the periodic table.
- Although it sits in Group 18, calculations suggest oganesson may be far more reactive and less noble-gas-like than radon.
- Oganesson is one of the few elements named after a living scientist at the time of naming.
- Elements 119 and beyond have not yet been confirmed, so oganesson remains the end of the officially named periodic table.
- Oganesson has atomic number 118 and symbol Og.
- Its predicted electron configuration is [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶.
- Oganesson is in Group 18, but relativistic effects may make it chemically unusual.
- Remember Og-294, Yuri Oganessian and completion of period 7.
What is the atomic number of oganesson?
The atomic number of oganesson is 118.
What is the electron configuration of oganesson?
Oganesson has the predicted electron configuration [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶.
What is oganesson used for?
Oganesson has no commercial use; it is used only in superheavy element nuclear and theoretical chemistry research.
Is oganesson a noble gas?
Oganesson is placed in Group 18, but relativistic calculations suggest it may not behave like a typical noble gas.
Is oganesson the heaviest element?
Oganesson, element 118, is the heaviest officially named and confirmed element currently on the periodic table.