oganesson
noun
oga·nes·son
ˌō-gə-ˈne-ˌsän 
ˌä-
: a short-lived, artificially produced radioactive element that has 118 protons
—symbol Og
see Chemical Elements Table
Examples of oganesson in a Sentence
Recent Examples on the Web
So for instance, to make the element oganesson, which has 118 protons, scientists usually fire a beam of calcium (with 20 protons) at a target made of californium (with 98 protons).
—
Michael Irving,
New Atlas,
25 July 2024
As of 2020, 18 years after the first successful creation of oganesson in a laboratory, scientists had reported making a total of five atoms of it.
—
Stephanie Pappas,
Scientific American,
14 May 2024
Oganessian is the namesake for oganesson, element 118, discovered in 2004 by his team at JINR and currently the heaviest ever made.
—
Daniel Clery,
Science | AAAS,
12 Feb. 2021
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Michael Irving,
New Atlas,
25 July 2024
As of 2020, 18 years after the first successful creation of oganesson in a laboratory, scientists had reported making a total of five atoms of it.
—
Stephanie Pappas,
Scientific American,
14 May 2024
Oganessian is the namesake for oganesson, element 118, discovered in 2004 by his team at JINR and currently the heaviest ever made.
—
Daniel Clery,
Science | AAAS,
12 Feb. 2021
Cite this Entry
“Oganesson.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/oganesson. Accessed 5 Jul. 2026.
Copy CitationKids Definition
oganesson
noun
oga·nes·son
ˌō-gə-ˈne-ˌsän
ˌä-
: a short-lived artificially produced radioactive element see element
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