bn:01874653n
Noun Concept
Categories: Promethium, Isotopes of promethium, Lists of isotopes by element
EN
isotope of promethium  isotopes of promethium  Pm-147  Promethium-126  Promethium-127
EN
Promethium is an artificial element, except in trace quantities as a product of spontaneous fission of 238U and 235U and alpha decay of 151Eu, and thus a standard atomic weight cannot be given. Wikipedia
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