MP Board · Class 11 · Chemistry · Classification of Elements and Periodicity in PropertiesWhy is the first ionization enthalpy of Nitrogen ($N$) higher than that of Oxygen ($O$)?
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Step-by-Step Solution
Nitrogen has electronic configuration $1s^2 2s^2 2p^3$ with half-filled p-orbitals which offer extra stability, making electron removal harder compared to oxygen ($2p^4$).
Detailed Options Breakdown
Option : Nitrogen has smaller atomic radius than Oxygen
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Classification of Elements and Periodicity in Properties.
Option 1: Nitrogen has extra stability due to half-filled p-orbitals (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 2: Oxygen has lower effective nuclear charge
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Classification of Elements and Periodicity in Properties.
Option 3: Nitrogen is a non-metal while Oxygen is a metalloid
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Classification of Elements and Periodicity in Properties.
💡 Study Guide: This question tests core syllabus concepts from Classification of Elements and Periodicity in Properties. For formulas, key summaries, and mock exam reference guides, read the full Classification of Elements and Periodicity in Properties Revision Notes.