Definition of atomic number 61
English to English noun - 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
source: WordNet 3.0
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atomic number 61, atomic number 6, atomic number 1, atomic number 76, atomic number 63, atomic number 41, atomic number 31, atomic number 91, atomic number 14, atomic number 21, atomic number 17, atomic number 65, atomic number 67, atomic number 71, atomic number 66, atomic number 11, atomic number 62, atomic number 16, atomic number 81, atomic number 46
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