Stable element

A stable element, or more specifically a stable isotope, means that it does not decay over time and can exist with no problem. Some examples of this are Carbon-12, Sulfur-32, and many more. Isotopes that are not stable are called radioactive isotopes.

Stable Element Media

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  Isotope half-lives. The darker more stable isotope region departs from the line of protons (Z) = neutrons (N), as the element number Z becomes larger.

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  Periodic table colored according to the number of stable isotopes. Elements with odd atomic numbers have at most one or two stable isotopes, while elements up to lead with even atomic numbers all have three or more stable isotopes, except for the first three: helium, beryllium, and carbon.