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  3. JEE Main & Advanced

JEE Main & Advanced JEE Main Solved Paper-2016

  • question_answer
    Which of the following atoms has the highest first ionization energy ? [JEE Main Solved Paper-2016 ]

    A) Sc           

    B) Rb

    C) Na                                         

    D) K

    Correct Answer: A

    Solution :

                    Due to poor shielding of d-electrons in Sc, \[{{\text{Z}}_{\text{eff}}}\]of Sc becomes more so that ionisation energy of Sc is more than Na, K and Rb.


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