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technetium |
2 definitions found From WordNet r 1.6 [wn]: technetium n : a crystalline metallic element not found in nature; occurs as one of the fission products of uranium [syn: {Tc}, {atomic number 43}] From Elements database 20001107 [elements]: technetium Symbol: Tc Atomic number: 43 Atomic weight: (98) Radioactive metallic transition element. Can be detected in some stars and the fission products of uranium. First made by Perrier and Segre by bombarding molybdenum with deutrons giving them Tc-97. Tc-99 is the most stable isotope with a half-life of 2.6*10^6 years. Sixteen isotopes are known Organic technetium compounds are used in bone imaging. Chemical properties are intermediate between rhenium and manganese.
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