英语单词短语词组“astatine”的中文翻译、释义及用法解析-英汉词典

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单词	astatine
释义	astatine noun[U] uk /ˈæs.tə.tiːn/us /ˈæs.tə.tiːn/ (symbolAt) achemicalelementthat isradioactiveand is therarestnaturalelementon the Earth'ssurface: 砹（地球表面最为稀少的一种放射性化学元素） Thepropertiesof astatineremainamystery.砹的属性仍然不为人知。 More examples Thelowestelementin thisgroupis also ahighlyradioactiveandrareelement, astatine. Fluorine and astatine arehalogens. What is thephysicalstateof astatine atroomtemperature? SMART Vocabulary: related words and phrases Chemical elements actinium alkali metal americium antimony berkelium bismuth brimstone calcium fluorine germanium lithium manganese nickel plutonium quicksilver selenium silicon sodium sulphur transition metal See more results » (Definition ofastatinefrom theCambridge Advanced Learner's Dictionary & Thesaurus© Cambridge University Press) Examplesofastatine astatine She discovered that the element 85astatineis a product of the natural decay processes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Accordingly, much less is known aboutastatinethan most other elements. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Four out of these isotopes (astatine-215,astatine-217,astatine-218, andastatine-219) are found due to their production in major natural decay chains. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The least stable ground state isotope isastatine-213, with a half-life of 125 nanoseconds. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Even though heavierastatineisotopes release less energy, no long-livedastatineisotope exists, due to the increasing role of beta decay (electron emission). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. All of its isotopes are short-lived; the most stable isastatine-210, with a half-life of 8.1 hours. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. There are 32 known isotopes ofastatine, with atomic masses (mass numbers) of 191 and 193223. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Astatine, which is usually classified as a nonmetal or a metalloid, has been predicted to have a metallic crystalline structure. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Francium is a highly radioactive metal that decays intoastatine, radium, and radon. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. While hydroiodic acid solutions are stable, the hydronium-astatide solution is clearly less stable than the water-hydrogen-astatinesystem. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Astatinemay be dark, or it may have a metallic appearance and be a semiconductor, or it may even be a metal. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The properties he reported for dakin do not correspond to those ofastatine, and the true identity of dakin is not known. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A visible piece ofastatinewould be immediately and completely vaporized due to the heat generated by its intense radioactivity. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The least stable one isastatine-214m1; its half-life of 265 nanoseconds is shorter than those of all ground states except that ofastatine-213. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Astatine-219 decays to polonium-215, which itself beta decays toastatine-215 with an even smaller probability of 0.00023%. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. 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. #https://dictionary.cambridge.org//dictionary/english/astatine##
随便看	out-of-mind-head out of order out-of-order out of place out-of-place out-of-pocket out-of-pocket out-of-pocket payment out of print out-of-print out-of-print book out of shape out-of-shape out of sight out-of-sight out of sight, out of mind out-of-sight-out-of-mind out of sorts out-of-sorts out-of-state out-of-state out of station out-of-station out-of-step-with out of step with someone/something

　

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更新时间：2024/12/27 8:39:01