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There are 3 words containing PROTACTINIdiprotactinium eka-protactinium protactinium 4 definitions found- diprotactinium — n. (Chemistry, especially in combination) Two protactinium atoms in a molecule.
- eka-protactinium — n. Unbitrium (Ubt), an unsynthesized chemical element with atomic number 123. — n. Unquadunium (Uqu), an unsynthesized chemical element with atomic number 141.
- protactinium — n. A chemical element (symbol Pa) with atomic number 91: a dense…
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