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89 Ac Actinium

Transition metal, mass: 227 u, no stable isotopes, abundance rank (earth/space): 86/?

Click image to magnify. This is only an illustration, not actinium itself. A soft, silvery metal, which is reported to glow blue. This is due to its radioactivity.

Actinium

Actinium starts the series of actinoids (elements 90-103), which are named after this element. It naturally occurs from uranium decay, the half-life of its most stable isotope is less than 22 years. It has very few applications, because it is difficult to handle and very dangerous. Chemically, it is similar to lanthanum. Most actinium decays to thorium, about 1.4% to francium.


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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