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JEE Main & Advanced Chemistry Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति Question Bank Self Evaluation Test - Classification of Elements and Periodicity in Properties

  • question_answer
    Which among the following elements has the highest first ionization enthalpy?

    A) Nitrogen    

    B) Boron

    C) Carbon                         

    D) Oxygen

    Correct Answer: A

    Solution :

      [a] Due to stable \[2{{s}^{2}}2{{p}^{3}}\] configuration (half filled p-orbital). Nitrogen atom has highest energy.     


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