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单词 显迹物
释义 〔iodine〕A lustrous, grayish-black, corrosive, poisonous halogen element having radioactive isotopes, especially I 131, used as a medical tracer and in thyroid disease diagnosis and therapy. Iodine compounds are used as germicides, antiseptics, and dyes. Atomic number 53; atomic weight 126.9044; melting point 113.5°C; boiling point 184.35°C; specific gravity (solid, at 20°C) 4.93; valence 1, 3, 5, 7. See table at element 碘:一种有光泽的,灰黑色,具有腐蚀性的,有毒的卤元素,有放射性同位素,特别是碘131,被用作医疗上的显迹物和诊断、医治甲状腺疾病。碘化合物被用作杀菌剂、抗感染剂和染料。原子序数53;原子重量126.9044;熔点113.5°C;沸点184.35°C;比重(固体,在20°C时)4.93;化合价1,3,5,7 参见 element
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