- Normally the proportion of the two isotopes of carbon is simply controlled by the rate of photosynthesis in plant tissues.
- The nuclei of the hydrogen isotopes are the proton, the deuteron, and the triton.
- When uranium is bombarded with neutrons, the two isotopes have differing nuclear reactions.
- Beta radiation is the emission of an electron from the nucleus of a radioactive isotope.
- Radioactive elements have different isotopes that decay at different rates.