Assertion: protactinium | /r/Synonym | the motherof actinium
Facets:
Source sentences:
text: Protactinium has been called the "mother" of actinium, which is formed by the alpha decay of protactinium.
text: Protactinium has been called the mother of actinium, which is formed by the alpha decay of protactinium.
text: Protactinium has been called the "mother" of actinium, which is formed by the alpha decay of protactinium.