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  5. The d-and f-Block Elements / d तथा f ब्लॉक के तत्व

JEE Main & Advanced Chemistry The d-and f-Block Elements / d तथा f ब्लॉक के तत्व Question Bank General Characteristics

  • question_answer
    The atomic radii of the elements are almost same of which series

    A) \[Fe-Co-Ni\]

    B) \[Na-K-Rb\]

    C) \[F-Cl-Br\]

    D) \[Li-Be-B\]

    Correct Answer: A

    Solution :

    \[Fe-CO-Ni\]. With the increase in the d-electrons, screening effect increases, this counter balances the increased nuclear charge due to increase in atomic number. As a result atomic radii remain practically same after chromium.


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