JEE Main & Advanced Chemistry The s-Block Elements Question Bank Alkali Metals

  • question_answer Magnitude of which of the following property of alkali metals  increases with the increase of  atomic number [MP PMT 1987]

    A) Electronegativity

    B) Ionic radius

    C) First ionization energy

    D) Melting point

    Correct Answer: B

    Solution :

    Element -              Li        Na         K        Rb        Cs
    Ionic radius - (pm) 76 102 138 152 167
    as the atomic no. increases the no. of shells increases hence, atomic radius increases.


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