 Discovery Information
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| Who: Fredrich Soddy, John Cranston, Otto Hahn, Lise Meitner |
| When: 1917 |
| Where: England/France |
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| Name Origin
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| protos (first); its is the parent of actinium, which is formed by radioactive decay.
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| Sources
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| Does not occur in nature. Found among fission products of uranium, thorium, and plutonium.
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| Uses
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| Because of its scarcity, high radioactivity and toxicity, there are currently no uses for protactinium outside of basic scientific
research.
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| Notes
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| Protactinium is both toxic and highly radioactive. |
| It is superconductive at temperatures below 1.4 K (-271.74'C). |
