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JEE Main Chemistry question

ChemistryClassification of Elements and Periodicity in PropertiesJEE Main

The electronic configuration of the atom having maximum difference in first and second ionisation energies is [Guj CET 2008]

Answer: (A)

Solution

Configuration (A) is sodium (): removing its single, loosely-held valence electron (low ) is easy, but removing a second electron means breaking into the very stable, fully filled neon-like core (), requiring a disproportionately large — giving the maximum

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Question ID VK-133193