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JEE Main & Advanced JEE Main Paper (Held on 12-4-2019 Afternoon)

  • question_answer
    Among the following, the energy of 2s orbital is lowest in : [JEE Main 12-4-2019 Afternoon]

    A) K         

    B) Na

    C) Li                                

    D) H

    Correct Answer: A

    Solution :

    In 'K', 2s orbital feel maximum attraction from nucleus (So having less energy) due to more \[{{Z}_{eff}}.\]


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