Concept information
Preferred term

Created: 2019-09-04T12:02:37
Definition
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Protactinium (formerly protoactinium) is a chemical element with the symbol Pa and atomic number 91.
(en)Source: https://en.wikipedia.org/wiki/Protactinium
Created: 1/20/22
Broader concept
- actinides (en)
In other languages
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