单词 | beryllium |
释义 | beryllium/bəˈrɪlɪəm /noun [mass noun] The chemical element of atomic number 4, a hard grey metal. (Symbol: Be) The reactive elements contained in alloys such as magnesium, strontium, sodium, calcium, beryllium, and titanium are also factors in oxide formation....
Beryllium is the lightest of the alkaline earth metals, and its chief source is the mineral beryl. It is used in the manufacture of light corrosion-resistant alloys and in windows in X-ray equipment. Rhymes |
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