element 118
Americannoun
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An artificially produced radioactive element, detected indirectly by decay, whose most stable isotope has a mass number of 294 and a half-life of less than two milliseconds.
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Also called ununoctium
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See Periodic Table
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.
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
Releasing an alpha changes the atom's identity: element 118 becomes 116, which becomes 114, and so on.
From Science Magazine • Jan. 30, 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
Similarly, although element 118 falls into the noble gas column, theory predicts that it will readily attract electrons—something no other noble gas does.
From Science Magazine • Jan. 30, 2019
Oganesson, formerly known as element 118, is named after Yuri Oganessian, a Russian nuclear physicist.
From Slate • Jun. 17, 2016
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
