| 单词 | molybdenum |
| 释义 | Word Frequency molybdenum(mɒˈlɪbdɪnəm) noun a very hard ductile silvery-white metallic element occurring principally in molybdenite: used mainly in alloys, esp to harden and strengthen steels. Symbol: Mo; atomic no: 42; atomic wt: 95.94; valency: 2–6; relative density: 10.22; melting pt: 2623°C; boiling pt: 4639°C Word origin C19: from New Latin, from Latin molybdaena galena, from Greek molubdaina, from molubdos lead |
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