单词 | 防止腐蚀 |
释义 | 〔tin〕Symbol Sn A malleable, silvery metallic element obtained chiefly from cassiterite. It is used to coat other metals to prevent corrosion and is a part of numerous alloys, such as soft solder, pewter, type metal, and bronze. Atomic number 50; atomic weight 118.69; melting point 231.89°C; boiling point 2,270°C; specific gravity 7.31; valence 2, 4. See table at element 符号 Sn 锡:一种银白色可延展的金属元素,主要从锡石中获取。它用于包裹其它金属以防止腐蚀,它也是各种合金,如软焊料、白腊、铅字合金和青铜的一部分。原子序数50;原子量为118.69;熔点231.89°C;沸点2,270°C;比重7.31;原子价2,4 参见 element |
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