Generally, the heavier elements have radioactive ... Cosmogenic isotopes are a result of cosmic ray activity in the atmosphere. Cosmic rays ejected from the stars at very high speed shatter other ...

Isotopes are forms of an element that have the same number of protons but different numbers of neutrons. There are three isotopes of hydrogen: hydrogen, deuterium (hydrogen-2) and tritium ...

Stable isotopes are non-radioactive forms of atoms. Although they do not emit radiation, their unique properties enable them to be used in a broad variety of applications, including water and soil ...