JEE Main & Advanced Chemistry Classification of Elements and Periodicity in Properties Question Bank Atomic and lonic radii

  • question_answer The atomic radius of elements of which of the following series would be nearly the same [MP PET 1997]

    A) \[Na\]\[K\]\[Rb\]\[Cs\]

    B) \[Li\]\[Be\]\[B\]\[C\]

    C) \[Fe\]\[Co\]\[Ni\]\[Cu\]

    D) \[F\]\[Cl\]\[Br\]\[I\]

    Correct Answer: C

    Solution :

    \[Fe,\,Co,\,Ni,\,Cu\]. Due to shielding of d-electrons, the effect of increased nuclear charge due to increase in atomic no. neutralised. Consequently atomic radius remains almost unchanged after chromium.

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