单词 | 电花 |
释义 | 〔beryllium〕A high-melting, lightweight, corrosion-resistant, rigid, steel-gray metallic element used as an aerospace structural material, as a moderator and reflector in nuclear reactors, and in a copper alloy used for springs, electrical contacts, and nonsparking tools. Atomic number 4; atomic weight 9.0122; melting point 1,278°C; boiling point 2,970°C; specific gravity 1.848; valence 2. See table at element 铍:一种高熔点、质轻、抗腐蚀、坚硬的青灰色金属元素,用作宇宙空间结构材料,如核反应器中的减速剂和反射体,铍铜合金用于制造弹簧、电接触器和无电花工具。原子序数4;原子量9.0122;熔点1,278°C;沸点2,970°C;比重1.848;化合价2 参见 element |
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