rutherfordium

from WordNet (r) 3.0 (2006)
rutherfordium
    n 1: a radioactive transuranic element which has been
         synthesized [syn: {rutherfordium}, {Rf}, {unnilquadium},
         {Unq}, {element 104}, {atomic number 104}]
    
from The Collaborative International Dictionary of English v.0.48
kurchatovium \kurchatovium\ n. [From Igor Kurchatov, a Russian
   scientist who worked on the atomic bomb.]
   A transuranic element of atomic number 104, symbol Ku; also
   called {rutherfordium}, symbol Rf. It is produced in very
   small quantities by nuclear reactions. In November 1993 the
   nomenclature committe of the American Chemical Society
   approved the name {rutherfordium} for element 104. Russsian
   investigators who claim to have first discovered element 104,
   isotope 260 (half-life 0.3 seconds) in 1964 at Dubna proposed
   the name kurchatovium. However, investigators at Berkely in
   1969 produced several isotopes of element 104 but were unable
   to produce isotope 260; they reported finding isotope 257,
   with a half-life of 4-5 seconds, isotope 259 with a half-life
   of 3-4 seconds, and isotope 258 with a shorter half-life.

   Syn: rutherfordium, Rf, Ku, unnilquadium, Unq, element 104,
        atomic number 104.
        [WordNet 1.5 +PJC] kurchee
    
from The Elements (07Nov00)
rutherfordium
Symbol: Rf
Competing name for {unnilquadium}, the 104th element, proposed by the
American Chemical Society.
    

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