Question

The correct order of electron affinity of the elements $F,Cl,O$ and $S$ is:

• A. $F>Cl>O>S$
• B. $F>O>Cl>S$
• C. $Cl>F>S>O$
• D. $Cl>S>O>F$

Answer 1

Answer: (D)

$Cl>S>O>F$

We know halogens with outer electronic configuration $n{s}^{2}n{p}^5$ have the highest electron affinity. $Cl$ has more $e^{-}$ affinity than $F$ due to the small size of $F$ and high electronegativity. And $S$ will have more $e^{-}$ affinity due to the bigger size than oxygen and can accommodate the new incoming $e^{-}$ more easily.