|Stable Elements with Radioactive Isotopes (4)|
These elements are generally considered stable (and have at least one stable isotope), but also have at least one naturally occurring (on earth) radioactive isotope. Generally speaking these radioactive isotopes are either very long-lived or occur as only a very small percentage of the element.
Click any element below to see all the samples of that element.
Text and images Copyright (c) 2010 by Theodore W. Gray.