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COMEDK2018ChemistryClassification of Elements and Periodicity in Properties

In the following, the element with the highest ionisation energy is

Options

  1. A[Ne] 3 s², 3 p¹
  2. B[ Ne ] 3 s², 3 p³
  3. C[Ne] 3 s², 3 p²
  4. D[ Ne ] 3 s², 3 p⁴

Correct answer

B. [ Ne ] 3 s², 3 p³

Step-by-step solution

The element [Ne] 3 s² 3 p³ have half-filled p -orbital. As a result, it is more stable. The ionisation energy is highest for this element.

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