Question

Considering the elements $F,Cl,OandS,$ the correct order of their electron affinity values is:

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

Answer 1

The correct option is C $Cl>F>S>O$

$\Delta HkJmo{l}^{-1}\to Cl=-349;F=-328;S=-200;O=-141$
Due to small sizes of F and O, EA value is less than expected.
$\therefore$ Option C is correct.