The first ionisation enthalpy of N (Z = 7) is higher than that of O (Z = 8) because

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MCQ (Single)Stability of Half-Filled and Completely Filled OrbitalsTrends in Ionization Enthalpy Across Periodic Table

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The first ionization enthalpy (∆i H ) values of the third period elements, Na, Mg and Si are respectively 496, 737 and 786 kJ mol–1. Predict whether the first ∆i H value for Al will be more close to 575 or 760 kJ mol–1 ? Justify your answer.

TextTrends in Ionization Enthalpy Across Periodic Table

What is the significance of the terms — 'isolated gaseous atom' and 'ground state' while defining the ionization enthalpy and electron gain enthalpy?

TextTrends in Ionization Enthalpy Across Periodic Table