ruth·er·for·di·um
(rŭth′ər-fôr′dē-əm)n. Symbol Rf
An artificially produced radioactive element with atomic number 104 that has only been produced in trace amounts. The isotope with mass number 261 has the longest confirmed half-life (65 seconds), although isotopes with longer half-lives have been reported. See Periodic Table.
[After Ernest Rutherford.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
rutherfordium
(ˌrʌðəˈfɔːdɪəm)n
(Elements & Compounds) a transactinide element produced by bombarding californium-249 nuclei with carbon-12 nuclei. Symbol: Rf; atomic number.: 104; atomic wt: 261. Name in the former Soviet Union: kurchatovium
[C20: named after Ernest Rutherford]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
un•nil•qua•di•um
(ˌyu nɪlˈkwɒd i əm)n.
provisional name for the transuranic element with atomic number 104. Symbol: Unq Also called rutherfordium.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ruth·er·ford·i·um
(rŭth′ər-fôr′dē-əm) Symbol Rf A synthetic, radioactive element that is produced by bombarding plutonium with carbon or neon ions. Its most stable isotope has a half-life of 65 seconds. Atomic number 104. See Periodic Table.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
| Noun | 1. |  rutherfordium - a radioactive transuranic element which has been synthesizedchemical element, element - any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter |
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