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

  • question_answer
    In which of the following pairs the difference between the covalent radii of the two metals is maximum [MP PET 1994]

    A) K, Ca

    B) Mn , Fe

    C) Co , Ni

    D) Cr , Mn

    Correct Answer: A

    Solution :

    Covalent radii decreases on going from left to right in periods. However among the transition elements the size do not changes much because the electrons add to the pneultimate d-subshells i.e. \[(n-1)\,d\text{-}\]subshell.

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