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searching for Isotopes of protactinium 2 found (5 total)

alternate case: isotopes of protactinium

Mendeleev's predicted elements (1,620 words) [view diff] exact match in snippet view article find links to article

material deriving from uranium that he could not identify. Different isotopes of protactinium were identified in Germany in 1913 and in 1918, but the name protactinium

Discovery of nuclear fission (12,607 words) [view diff] exact match in snippet view article find links to article

demonstrating that von Grosse was incorrect, and they were not isotopes of protactinium. Moreover, the chemical reactions involved ruled out all elements