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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.]
(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]
un•nil•qua•di•um(ˌyu nɪlˈkwɒd i əm)
provisional name for the transuranic element with atomic number 104. Symbol: Unq Also called rutherfordium.
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.
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|Noun||1.||rutherfordium - a radioactive transuranic element which has been synthesized|