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Protactinium (new) - Periodic Table of Videos

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The team at periodicvideos has created a TED-Ed Lesson for every element of the periodic table. Protactinium is element number 91 on the periodic table.

The honor of naming protactinium went to Lise Meitner, discoverer of the longest lived isotope. Which is the only element that has separate names for its different isotopes?

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