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Protactinium   Listen
noun
Protactinium  n.  The radioactive chemical element, of atomic number 91; Atomic symbol Pa; at. wt. of longest-lived isotope, 231 (T½ = 32,500 yrs.) Also called brevium, Uranium X2 and UX2.






Collaborative International Dictionary of English 0.48








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Words linked to "Protactinium" :   atomic number 91, metallic element, protoactinium, pa



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