English
Detailed Synonyms for atomic number 91 in English
atomic number 91:
atomic number 91 [the ~] noun
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the atomic number 91
– a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead 1the Pa; the atomic number 91; the protactinium; the protoactinium– a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead 1