fermium

fer·mi·um

a radioactive, metallic chemical element, one of the actinides, produced by intense neutron bombardment of plutonium, as in a cyclotron: symbol, Fm; at. no. 100

Origin of fermium

ModL: so named (1955) by A. Ghiorso and co-workers, after E. Fermi (in honor of his studies in nuclear physics) + -ium

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fermium

noun

A synthetic transuranic metallic element having over 20 isotopes and isomers with mass numbers ranging from 242 to 260. The longest-lived isotope has mass number 257 and a half-life of approximately 100 days. Atomic number 100; melting point 1527°C; valence 3. See Periodic Table.

Origin of fermium

AfterEnrico Fermi

THE AMERICAN HERITAGE® DICTIONARY OF THE ENGLISH LANGUAGE, FIFTH EDITION by the Editors of the American Heritage Dictionaries. Copyright © 2016, 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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"Fermium." YourDictionary. LoveToKnow. www.yourdictionary.com/FERMIUM.

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Fermium. (n.d.). In YourDictionary. Retrieved from https://www.yourdictionary.com/FERMIUM

Symbol Fm

A synthetic, radioactive metallic element of the actinide series that is produced from plutonium or uranium. Its most stable isotope is Fm 257 with a half-life of approximately 100 days. Atomic number 100.

See Periodic Table

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"Fermium." YourDictionary. LoveToKnow. www.yourdictionary.com/FERMIUM.

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Fermium. (n.d.). In YourDictionary. Retrieved from https://www.yourdictionary.com/FERMIUM

Noun

(uncountable)

A transuranic chemical element (symbol Fm) with an atomic number of 100.

Origin

Named for Enrico Fermi.

English Wiktionary. Available under CC-BY-SA license.

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MLA Style

"Fermium." YourDictionary. LoveToKnow. www.yourdictionary.com/FERMIUM.

APA Style

Fermium. (n.d.). In YourDictionary. Retrieved from https://www.yourdictionary.com/FERMIUM

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