oganesson

Also known as Og, element 118, eka-radon, ununoctium, Uuo

Oganesson is a synthetic chemical element; it has 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. In December 2015, it was recognized as one of four new elements by the Joint Working Party of the international scientific bodies IUPAC and IUPAP. It was formally named on 28 November 2016. The name honors the nuclear physicist Yuri Oganessian, who played a leading role in the discovery of the heaviest elements in the periodic table.

AI overview

Oganesson is a human-made chemical element (symbol Og, atomic number 118) that was first created in 2002 by Russian and American scientists at a research institute in Russia. It was officially recognized and named in 2015-2016 in honor of nuclear physicist Yuri Oganessian, who made major contributions to discovering the heaviest elements on the periodic table.

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Wikidata facts

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Unicode character: 鿫
electron configuration: [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶
element symbol: Uuo
Commons category: Oganesson
Commons gallery: Oganesson
atomic number: 118
time of discovery or invention: 2002-06-00
ionization energy: 1560000
oxidation state: 6
density: 4.9
boiling point: 80
molar fusion enthalpy: 23501

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Article

17 sections

Contents

Introduction
History
Early speculation
Unconfirmed discovery claims
Discovery reports
Confirmation
Naming
Characteristics
Nuclear stability and isotopes
Calculated atomic and physical properties
Predicted compounds
See also
Notes
References
Bibliography
Further reading
External links

Oganesson has the highest atomic number and highest atomic mass of all known elements. On the periodic table of the elements it is a p-block element, a member of group 18, and the last member of period 7. Its only known isotope, oganesson-294, is highly radioactive, with a half-life of 0.7 ms. This half-life is too short for chemical studies. Because of relativistic effects, theoretical studies predict that it would be a solid at room temperature, and significantly reactive, unlike the other members of group 18 (the noble gases).