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KVPY2015ChemistryClassification of Elements and Periodicity in Properties

The electronic configuration of an element with the largest difference between the 1^ st and 2^ nd ionization energies is

Options

  1. A1 ~s ² 2 ~s ² 2 p ⁶
  2. B1 s² 2 s² 2 p⁶ 3 s¹
  3. C1 ~s ² 2 ~s ² 2 p ⁶ 3 ~s ²
  4. D1 ~s ² 2 ~s ² 2 p ¹

Correct answer

B. 1 s² 2 s² 2 p⁶ 3 s¹

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