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the elements beyond bismuth (Bi) in the Periodic Table of the Elements display radioactivity.There are natually occurring radioactive isotopes of many of the other elements as well.Naturally occurring radioisotopes can be used to date : Radioisotopes that emit low-penetrating alpha particles and that have a relatively long half-life have found use in domestic settings such as smoke detectors.
A longer half-life, such as hundreds or thousands of years, means that the radioisotope continues to emit harmful radiation for a very long period of time.
Nuclear materials (that is, substances that emit nuclear radiation) are fairly common and have found their way into our normal vocabularies in many different ways. In this article, we will look at nuclear radiation so that you can understand exactly what it is and how it affects your life on a daily basis.
You have probably heard (and used) many of the following terms: All of these terms are related by the fact that they all have something to do with nuclear elements, either natural or man-made.
Carbon-14 is produced constantly as our atmosphere is bombarded by cosmic rays.
It is incorporated into the carbon cycle, so that all living things, including you, contain radioactive carbon-14.