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JEE Main & Advanced Chemistry Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति Question Bank Ionisation Energy

  • question_answer
    Highest ionisation energy stands for  [DPMT 2000]

    A) He

    B) C

    C) N

    D) H

    Correct Answer: A

    Solution :

    He has highest ionisation energy due to it full fill 1s-orbital.


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