atomic number 61 (0 synonym found)

Definition of atomic number 61:

(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

Definition of atomic number 61:

(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
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