English
Detailed Synonyms for atomic number 61 in English
atomic number 61:
atomic number 61 [the ~] noun
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the atomic number 61
– 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 1the promethium; the Pm; the atomic number 61– 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 1