Question:medium

The property/properties that show irregularity in the first four elements of group-17 are:

Show Hint

For group-17 elements, remember that the irregularities mainly arise due to the electron configuration and atomic size trends.
Updated On: Jan 14, 2026
  • Covalent radius
  • Ionic radius
  • Electron affinity
  • First ionization energy 

Show Solution

The Correct Option is C

Solution and Explanation

The sequence of the first four elements in group-17 is presented below, with specific properties indicated:
  • F < Cl < Br < I (Covalent radius)
  • Cl > F > Br > I (Electron affinity)
  • F < Cl < Br < I (Ionic radius)
  • F > Cl > Br > I (First ionization energy)
The electron affinity trend deviates from the general pattern.
Was this answer helpful?
0

Top Questions on Periodic Table