| 单词 | europium |
| 释义 | Word Frequency europium(jʊˈrəʊpɪəm) noun a soft ductile reactive silvery-white element of the lanthanide series of metals: used as the red phosphor in colour television and in lasers. Symbol: Eu; atomic no: 63; atomic wt: 151.965; valency: 2 or 3; relative density: 5.244; melting pt: 822°C; boiling pt: 1527°C Word origin C20: named after Europe + -ium |
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