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91 Pa Protactinium

Actinoid, mass: 231.04 u, no stable isotopes, abundance rank (earth/space): 85/?

Click image to magnify. This is only an illustration, not protactinium itself. A compact chunk of the radioactive heavy metal produces so much heat that it glows red.

Protactinium

Protactinium primarly is generated from the decay of the rare isotope uranium 235 (via the very unstable thorium 231). Therefore it only exists in small amounts, most of it is found in nuclear waste. The half-life of the most stable isotope is 32760 years, which makes the highly toxic element even in tiny amounts very dangerous for a long time. Outside of science, no reasonable applications for protactinium exist. Nearly all protactinium decays further to actinium.


Creative Commons License The images are licensed under a Creative Commons Attribution 3.0 Unported License, unless otherwise noted. Attribution by linking (outside of the internet credit with url) to the according element page.


Page last changed on March 10. 2011

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