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10th Class Science Periodic Classification of Elements Question Bank Periodic Classification of Elements

  • question_answer
    Element P belongs to first group and fourth period of the periodic table. Element Q succeeds P in the group and element R succeeds Q in the period.
    The correct increasing order of their atomic radii is
     

    A) Q < R < P

    B) P < Q < R

    C) P < R < Q

    D) Cannot be predicted.

    Correct Answer: C

    Solution :

    P and Q belong to same group and Q succeeds P i.e., Q is bigger in size than P. Now, Q and R belong to same period and R succeeds Q. Therefore, R will be smaller in size than 0 but will be bigger in size than P.


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