6.1 Radioactive Substances


6.1 Radioactive Substances
1.      Radioactive substances are substances with unstable nuclei in their atoms. Unstable nuclei will decay and emit radioactive radiation.
2.      Examples of radioactive substances are:
            (a)  Carbon-14
            (b)  Cobalt-60
            (c)  Iodine-131
            (d)  Uranium