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  3. Chemistry
  4. Which of the following has lowest electron affinity?

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Q. Which of the following has lowest electron affinity?

J & K CETJ & K CET 2005

Solution:

In a group the electron affinity decreases on moving downward because the size increases.
Halogen $F$ $Cl$ $Br$ $I$
EA (eV) $-3.6$ $-3.8$ $-3.5$ $-3.2$

The low value of electron affinity of fluorine than chlorine is due to its small size.