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日本語WordNet(英和)
astatine
名詞
Wiktionary英語版
出典：Wiktionary
astatine
出典:『Wiktionary』 (2026/04/24 00:53 UTC 版)
| Chemical element |
|---|
| At Atomic number 85 astatine |
| Previous: ← polonium (Po) |
| Next: radon (Rn) → |
| English Wikipedia article on Astatine |
語源
From Ancient Greek ἄστατος (ástatos, “unstable”) + -ine.
名詞
astatine (countable and uncountable, plural astatines)
- A highly radioactive chemical element (symbol At), one of the halogens, with atomic number 85.
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2003, Bill Bryson, A Short History of Nearly Everything, BCA, page 221:
-
Astatine, for instance, is practically unstudied. It has a name and a place on the periodic table (next to Marie Curie's polonium), but almost nothing else.
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派生語
- astatane
- astatate
- astatide
- astatinate
- eka-astatine
アナグラム
- Satanite, Tánaiste, in a state, sanitate
ウィキペディア英語版
出典：Wikipedia
Astatine
出典:『Wikipedia』 (2011/07/04 18:58 UTC 版)
英語による解説
ウィキペディア英語版からの引用
- 引用
Astatine ( /ˈæstəˌtiːn/ as-tə-teen or /ˈæstəˌtɪn/ as-tə-tin) is a radioactive chemical element with the symbol At and atomic number 85. It is the heaviest known halogen. Astatine is produced by radioactive decay in nature, but due to its short half life it is found only in minute amounts. Astatine was first produced by Dale R. Corson, Kenneth Ross MacKenzie, and Emilio Segrè in 1940. Three years passed before traces of astatine were also found in natural minerals. Until recently most of the physical and chemical characteristics of astatine were inferred from comparison with other elements. Some astatine isotopes have been used as alpha-particle emitters in science, and medical applications for astatine-211 have been tested. Astatine is the rarest naturally occurring element, with less than 30 grams (1.058 ounces) estimated to be contained in the entire Earth's crust.
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- Text is available under Creative Commons Attribution-ShareAlike (CC-BY-SA) and/or GNU Free Documentation License (GFDL).
Weblio英和・和英辞典に掲載されている「Wiktionary英語版」の記事は、Wiktionaryのastatine (改訂履歴)の記事を複製、再配布したものにあたり、Creative Commons Attribution-ShareAlike (CC-BY-SA)もしくはGNU Free Documentation Licenseというライセンスの下で提供されています。
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- Text is available under Creative Commons Attribution-ShareAlike (CC-BY-SA) and/or GNU Free Documentation License (GFDL).
Weblio英和・和英辞典に掲載されている「Wikipedia英語版」の記事は、WikipediaのAstatine (改訂履歴)の記事を複製、再配布したものにあたり、Creative Commons Attribution-ShareAlike (CC-BY-SA)もしくはGNU Free Documentation Licenseというライセンスの下で提供されています。
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