1 Results for atomic number 61
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หรือค้นหา: -atomic number 61-, *atomic number 61*Too few results, automatically try *atomic number 61*
WordNet (3.0)
| promethium | (n) 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, Syn. Pm, atomic number 61 |
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