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Protoactinium
Definition of Protoactinium
1.
A short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead
Noun
Synonyms for word "protoactinium"
atomic number 91
pa
protactinium
Semanticaly linked words with "protoactinium"
metal
metallic element
Hyponims for word "protoactinium"
metal
metallic element