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日本語WordNet(英和)
europium
名詞
ウィキペディア英語版
出典：Wikipedia
Europium
出典:『Wikipedia』 (2011/07/03 19:06 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
Europium (
/jʊˈroʊpiəm/ ew-roh-pee-əm) is a chemical element with the symbol Eu and atomic number 63, which was named after the continent of Europe. It is a moderately hard silvery metal which readily oxidizes in air and water. Being a typical member of the lanthanide series, europium usually assumes the oxidation state +3; however, europium compounds with the oxidation state +2 are also common, and all of them are slightly reducing. Europium has no significant biological role and is relatively non-toxic compared to other heavy metals.
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