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Question: Answered & Verified by Expert
In the following, the element with the highest ionisation energy is
ChemistryClassification of Elements and Periodicity in PropertiesCOMEDKCOMEDK 2018
Options:
  • A [Ne] $3 s^{2}, 3 p^{1}$
  • B $[\mathrm{Ne}] 3 s^{2}, 3 p^{3}$
  • C [Ne] $3 s^{2}, 3 p^{2}$
  • D $[\mathrm{Ne}] 3 s^{2}, 3 p^{4}$
Solution:
1492 Upvotes Verified Answer
The correct answer is: $[\mathrm{Ne}] 3 s^{2}, 3 p^{3}$
The element [Ne] $3 s^{2} 3 p^{3}$ have half-filled $p$-orbital.
As a result, it is more stable.
$\therefore$ The ionisation energy is highest for this element.

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