JEE CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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Among the following elements, the one having the highest ionisation energy is

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Correct option: C

\left[ {Ne} \right]\,\,3{s^2}\,\,3{p^3}

The correct answer is C ([Ne] 3s² 3p³) because half-filled p orbitals provide extra stability, leading to a higher ionization energy.

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