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NEETChemistryClassification of Elements and Periodicity in Properties

Why is it easier to remove the fourth 2p-electron from oxygen than one of the three 2p-electrons from nitrogen?

Options

  1. AOxygen has fewer 2p-electrons.
  2. BOxygen has a smaller nucleus.
  3. COxygen has more shielding electrons.
  4. DOxygen has greater electron-electron repulsion.

Correct answer

D. Oxygen has greater electron-electron repulsion.

Step-by-step solution

In the oxygen atom, two of the four 2p-electrons must occupy the same 2p-orbital, resulting in increased electron-electron repulsion, making it easier to remove an electron compared to nitrogen.

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