单词 | thallium |
释义 | thallium [`thal·ē·ǝm] CHEMISTRY A metallic element in group III, symbol Tl, atomic number 81, atomic weight 204.37; insoluble in water, soluble in nitric and sulfuric acids, melts at 302°C, boils at 1457°C. METALLURGY Bluish-white metal with tinlike malleability, but a little softer; used in alloys. |
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