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  1. The most suitable unit for expressing nuclear radius is :

  2. A.

     Nanometre

    B.

     Fermi

    C.

     Angstrom

    D.

     Micron

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    Answer : Option C

    Explanation :

    The atomic radius is a measure of the size of an atom. It is defined as one-half the distance between the nuclei of two identical atoms that are bonded together. Angstrom is the most common unit used for measuring atomic radius. It is equivalent to 1.0 × 1010 meters. Under most definitions the radii of isolated neutral atoms range between 30 and 300 pm (trillionths of a metre), or between 0.3 and 3 angstroms.


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