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    • Diagram showing how radioactivity is all around us.
    Rights: The University of Waikato Te Whare Wānanga o Waikato Published 17 September 2009 Size: 36 KB Referencing Hub media

    Radioactivity is all around us. The food we eat, the air we breathe, the buildings we live in, all contain small amounts of radioactive materials. This background radiation has and always will be present.

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      Radioisotopes

      Closer examination of the atoms that make up a given element has shown that, although they have the same number of protons, they can have differing numbers of neutrons. For example, the element ...

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