promethium

pro·me·thi·um | \ prə-ˈmē-thē-əm

How to pronounce promethium (audio)

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Definition of promethium

: a radioactive metallic element of the rare-earth group obtained as a fission product of uranium or from neutron-irradiated neodymium — see Chemical Elements Table

Examples of promethium in a Sentence

Recent Examples on the Web One promethium isotope, with eighty-eight neutrons, has a half-life of a few days; the other, with eighty-six neutrons, has a half-life of a few years. — Neima Jahromi, The New Yorker, "The Histories Hidden in the Periodic Table," 27 Dec. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'promethium.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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Cite this Entry

“Promethium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/promethium. Accessed 20 Oct. 2020.

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