NEET UG 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}

Option C is correct because half-filled p orbitals (

p^3

) have extra stability, leading to a higher ionization energy.

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