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NEET Sample Paper NEET Sample Test Paper-13

  • question_answer
    The species \[Ar,{{K}^{+}}\]and \[C{{a}^{2+}}\]contain the same number of electrons. In which order do their radii increase?

    A) \[C{{a}^{2+}}<{{K}^{+}}<Ar\]

    B) \[{{K}^{+}}<Ar<C{{a}^{2+}}\]

    C) \[Ar<{{K}^{+}}<C{{a}^{2+}}\]

    D) \[C{{a}^{2+}}<Ar<{{K}^{+}}\]

    Correct Answer: A

    Solution :

     In case of isoelectronic species, radius decreases with increase in nuclear charge.


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