What does protoactinium mean?
Protoactinium means Dated form of protactinium..
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Pronunciation varies by accent · noun
Dated form of protactinium..
Use protoactinium when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Protoactinium means Dated form of protactinium..
Common synonyms include pa, protactinium, atomic number 91.
The opposite depends on the specific sense.
Use protoactinium where its definition matches the intended context.
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