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berkelium    
n. 放射性元素,符号Bk,原子序为98

放射性元素,符号Bk,原子序为98

berkelium
n 1: a radioactive transuranic element; discovered by bombarding
americium with helium [synonym: {berkelium}, {Bk}, {atomic
number 97}]

berkelium \ber*ke"li*um\ (b[~e]r*k[=e]"l[-e]*[u^]m), n. [from
the city of Berkeley, California, location of the University
of California campus where it was discovered.]
a chemical element of the transuranic series. Chemical symbol
Bk; atomic number 97; atomic weight 247. It is a radioactive
element, with no stable isotopes; the longest-lived isotope
is of mass number 247.07, decaying by alpha-emission with a
half-life of 1,400 years. The isotope with atomic weight 249
has a half-life of 314 days, and was isolated in weighable
quantities.

Syn: Bk.
[WordNet 1.5 PJC]


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  • Berkelium - Wikipedia
    Berkelium is a soft, silvery-white, radioactive metal The berkelium-249 isotope emits low-energy beta particles and thus is relatively safe to handle It decays with a half-life of 330 days to californium -249, which is a strong emitter of ionizing alpha particles
  • Berkelium | Properties, Use, Facts | Britannica
    Berkelium, synthetic chemical element of the actinoid series of the periodic table, atomic number 97 All berkelium isotopes are radioactive, and the only use of berkelium has been in the synthesis of heavier elements such as tennessine
  • Berkelium - Element information, properties and uses | Periodic Table
    Many compounds of element 97, berkelium, have been prepared Unlike the extremely short half-lives possessed by the superheavy elements like 117 and 118 that have been in the news recently, experiments on berkelium are relatively easy to perform and its chemistry has been studied in some detail
  • Berkelium Facts - Element Bk Atomic Number 97
    Berkelium (Bk) is a synthetic, radioactive element in the actinide series of the periodic table With the atomic number 97, it is the fifth transuranium element
  • Berkelium | Bk (Element) - PubChem
    Chemical element, Berkelium, information from authoritative sources Look up properties, history, uses, and more
  • Berkelium Element Facts - chemicool. com
    Berkelium was the fifth synthetic transuranium element of the actinide series to be discovered It was first produced in 1949 by Stanley Thompson, Albert Ghiorso and Glenn Seaborg in California, USA
  • Berkelium (Bk) - Periodic Table (Element Information More)
    Berkelium is a synthetic element which can only be prepared in a laboratory, and till now a very small amount of berkelium has been produced Berkelium has around 20 isotopes and all of them are radioactive in nature
  • Periodic Table of Elements: Los Alamos National Laboratory
    Berkelium, the eighth member of the actinide transition series, was first produced in 1949 by Thompson, Ghiorso, and Seaborg via accelerator bombardment of 241 Am with high energy alpha particles
  • Berkelium (Bk) - Periodic Table
    Berkelium was discovered by Glenn T Seaborg, Albert Ghiorso and Stanley G Thompson in 1949 at the University of California, Berkeley It was produced by the bombardment of americium with alpha particles
  • Berkelium (Bk) - Definition, Preparation, Properties, Uses, Compounds . . .
    What is Berkelium? Berkelium is a synthetic, radioactive element with the symbol Bk and atomic number 97 belonging to the actinide series It was discovered in 1949 by scientists at the University of California, Berkeley, which inspired its name





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