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JEE Main2012ChemistryClassification of Elements and Periodicity in PropertiesActual

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

Options

  1. ANitrogen
  2. BBoron
  3. CCarbon
  4. DOxygen

Correct answer

A. Nitrogen

Step-by-step solution

Due to stable 2 s^2 2 p^3 configuration. (half filled p -orbital) Nitrogen atom has highest energy.

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