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Question

How is Electronegativity vary in Halogen family?


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Solution

Electronegativity in Halogens

  • The ability of an atom or a molecule to attract the shared pair of an electron towards itself to form a covalent bond is called electronegativity.
  • On going down the group the electronegativity decreases.
  • The electronegativity values of the halogen group are given below.

F=3.98,Cl=3.16,Br=2.96,I=2.66,At=2.2

  • Chlorine has a higher electron affinity than Fluorine.
  • Fluorine is the most electronegative element, it has electronegativity of 3.98, but still, its electron affinity is less than that of chlorine.
  • It is because of the small size of fluorine.
  • The electronegativity of the Halogens decreases as we go down the group, the elements get larger and therefore less reactive.

The descending order of electronegativity in the halogens is F>Cl>Br>I>At>Ts.


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