| 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. |