Chemistry
History of Science
Nuclear Physics
Elements and Compounds

What are radioactive elements?

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01/11/2013

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elements with a nonstable isotope or at least one naturally occurring isotope that is radioactive.

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All elements have radioactive isotopes.
There are a lot of radioactive elements:

Technetium, Promethium, Polonium, Astatine, Radon, Francium...

Here is the whole list: http://periodictable.com/Elements/Radioactive