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Question

Why most active element in group 17 is Fluorine?


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Solution

Fluorine:

  • Fluorine is the most active element in Group 17's elements.
  • Fluorine has a shorter distance between the nucleus and the outermost electrons because the nuclear pull is stronger on the outermost shells.
  • Fluorine's reactivity is due to its extraordinarily high oxidizing power and low dissociation energy .
  • The tendency of nonmetals to gain electrons determines their reactivity.
  • The tendency to gain electrons decreases as we move down the group because the effective nuclear charge decreases as atomic size increases.
  • Hence, Fluorine is most electronegative and thus is most reactive among halogens.

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