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单词 transuranic element
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A radioactive actinide metal, neptunium is the firsttransuranicelement.
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It is the seventhtransuranicelement, and an actinide.
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It is the antepenultimate actinide and the ninthtransuranicelement.
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This amount declines slowly as the americium decays into neptunium-237, a differenttransuranicelement with a much longer half-life (about 2.14 million years).
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In chemistry, atransuranicelementreceives a permanent name and symbol only after its synthesis has been confirmed.
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It was the sixthtransuranicelementto be synthesized.
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It is a metallic radioactivetransuranicelementin the actinide series, usually synthesized by bombarding einsteinium with alpha particles.
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A metallic radioactivetransuranicelementin the actinide series, it is the first element that currently can not be produced in macroscopic quantities through neutron bombardment of lighter elements.
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He independently discovered thetransuranicelementneptunium.
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Of those, 11 are the transuranic elements, the ones which are artificially made by man.
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The most troublesome transuranic elements in spent fuel are neptunium-237 (half-life two million years) and plutonium-239 (half-life 24,000 years).
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Spent fuel includes fission products, which generally must be treated as waste, as well as uranium, plutonium, and other transuranic elements.
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This could either be viewed as good (generate more fuel) or can be viewed as bad (generation of more "radiotoxic" transuranic elements).
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There is no practical application of berkelium outside of scientific research which is mostly directed at the synthesis of heavier transuranic elements and transactinides.
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Berkelium-249 is a common target nuclide to prepare still heavier transuranic elements and transactinides, such as lawrencium, rutherfordium and bohrium.
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Sometimes, eka- is still used to refer to some of the transuranic elements, for example "eka-radon" for ununoctium and "eka-actinium" (or "dvi-lanthanum") for untriennium.
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A supercollider orbits the entire equator of this new star, and is used to produce stable, artificial transuranic elements.
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The chemical separation of the transuranic elements and the fuel manufacturing, as well as the structure materials, are important issues.
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These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.

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更新时间:2025/1/18 20:18:09