Question:

Which electronic configuration of an element has abnormally high difference between second and third ionisation energy?

Updated On: Sep 9, 2024
  • 1s$^2,2s^2 2p^6, 3s^1$
  • $1s^2,2s^2 2p^6, 3s^2 3p^1$
  • $1s^2,2s^2 2p^6, 3s^2 3p^2$
  • $1s^2,2s^2 2p^6, 3s^2$
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The Correct Option is D

Solution and Explanation

When the element having $1s^2, 2s^2 2p^6, 3s^2$ configuration, loss two electrons, then it acquire the electronic configuration of noble gas (Ne), so to remove third electron a large amount of energy is required and hence, its second and third ionisation energy have large difference.
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Concepts Used:

Haloalkanes and Haloarenes - Classification

Classification of Haloalkanes and Haloarenes are as follows:

Haloalkanes and Haloarenes are Classified on the Basis of the Number of Halogen Atoms:

These are further classified as mono, di, or polyhalogen (tri-,tetra-, etc.) compounds depending on whether they contain one, two or more halogen atoms in their structures. For example;

  • Monohaloalkane
  • Dihaloalkane
  • Trihaloalkane

Haloalkanes and Haloarenes are Classified on Compounds Containing sp3 C—X Bond (X= F, Cl, Br, I)

This class includes:

  • Alkyl halides or haloalkanes (R—X)
  • Allylic halides
  • Benzylic halides

Haloalkanes and Haloarenes are Classified on Compounds Containing sp2 C—X Bond

This class includes:

  • Vinylic halides
  • Aryl halides