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oganesson

American  
[oh-gan-uh-suhn] / oʊˈgæn ə sən /

noun

Chemistry, Physics.
  1. a superheavy, synthetic, radioactive element with a short half-life. Og; 118.


Etymology

Origin of oganesson

Named in 2016; after Yuri Tsolakovich Oganessian (born 1933), Russian nuclear physicist of Armenian descent + -on 2 ( def. )

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

If so, it could form a periodic table, much like our own, that atlas of all known matter that includes everything from hydrogen to oganesson.

From Salon Nov. 30, 2023

Scerri doesn’t believe the periodic table is seriously threatened by elements like oganesson; he points out that some of the electrons in gold atoms spin at velocities that approach light speed, too.

From The New Yorker Dec. 27, 2019

But the periodic table contains still more; the heaviest so far is element 118, oganesson, a “super-heavy” element with 118 protons and a half-life of half a millisecond.

From New York Times Aug. 27, 2019

Fittingly, no living person has shaped the architecture of the periodic table more than he has, which is why element 118 is called oganesson.

From Science Magazine Jan. 30, 2019

Electrons generally orbit atomic nuclei in distinct shells, but calculations show that the outer electrons of oganesson, the heaviest element found so far, may instead orbit the nucleus as a gas.

From Nature Feb. 5, 2018

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