| 单词 | Technetium 99m |
| 释义 | Technetium 99m《英文msh词典》Technetium 99m [同义词] Technetium 99m [主题词] Technetium [中文释义] 99m锝 [英文释义] The first artificially produced element and a radioactive fission product of URANIUM. Technetium has the atomic symbol Tc,atomic number 43,and atomic weight 98.91. All technetium isotopes are radioactive. Technetium 99m (m=metastable) which is the decay product of Molybdenum 99,has a half-life of about 6 hours and is used diagnostically as a radioactive imaging agent. Technetium 99 which is a decay product of technetium 99m,has a half-life of 210,000 years. |
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