中文翻译与英英解释 | n.
【化学】钷〔略 Pm;旧名 illinium ?〕。
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| a soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium
同义词：Pm, atomic number 61,
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| Promethium, originally prometheum, is a chemical element with the symbol Pm and atomic number 61. All of its isotopes are radioactive; it is one of only two such elements that are followed in the periodic table by elements with stable forms, a distinction shared with technetium. |
例句与用法 | 1. | Examination of radioactive materials for foods - determination of promethium - 147
食品中放射性物质检验钜- 147的测定
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