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SSC Sample Paper SSC-CGL TIER - I Sample Test Paper-1

  • question_answer
    Which of the following elements does not exhibit natural radioactivity?

    A)  Uranium          

    B)  Thorium

    C)  Aluminium       

    D)  Polonium

    Correct Answer: C

    Solution :

     Aluminium does not exhibit natural radioactivity. Radioactivity occurs in unstable atomic nuclei, the ones that don?t have enough binding energy to hold the nucleus together due to excess of either protons or neutrons. Polonium, Thorium and Uranium are all radioactive elements.


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