单词 | rutherfordium |
释义 | rutherfordium[ ruhth-er-fawr-dee-uhm, -fohr-, ruhth- ] / ˌrʌð ərˈfɔr di əm, -ˈfoʊr-, ˌrʌθ- / noun Chemistry, Physics.a superheavy, synthetic, radioactive element with a very short half-life. Symbol: Rf; atomic number: 104. Formerly un·nil·qua·di·um [uhn-uhn-kwah-dee-uhm], /ˌʌn ənˈkwɑ di əm/, el·e·ment 104 . Origin of rutherfordiumFirst recorded in 1965–70; named after English physicist Ernest Rutherford. Words nearby rutherfordiumruthenic, ruthenious, ruthenium, Rutherford, Rutherford, Ernest, rutherfordium, Rutherford scattering, ruthful, ruthless, rutidosis, rutilant Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for rutherfordiumrutherfordium / (ˌrʌðəˈfɔːdɪəm) / nouna transactinide element produced by bombarding californium-249 nuclei with carbon-12 nuclei. Symbol: Rf; atomic number.: 104; atomic wt: 261Name in the former Soviet Union: kurchatovium Word Origin for rutherfordiumC20: named after Ernest Rutherford Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Medical definitions for rutherfordiumrutherfordium [ rŭð′ər-fər′dē-əm ] n. Symbol RfA radioactive synthetic element whose longest-lived isotopes haved mass numbers of 253, 255, 257, and 259 with half-lives of 1.8, 1.6, 4.7, and 3.4 seconds. Atomic number 104. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for rutherfordiumrutherfordium [ rŭð′ər-fôr′dē-əm ] RfA synthetic, radioactive element that is produced by bombarding plutonium with carbon or neon ions. Its most stable isotope is Rf 261 with a half-life of 62 seconds. Atomic number 104. See Periodic Table. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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