Question

Highest electron affinity is shown by

• A. $O^{-}$
• B. $F^{-}$
• C. $Cl_{2}$
• D. $F_{2}$

Answer 1

Answer: (A)

$O^{-}$

Answer 2

Molecules of $F _{2}, Cl _{2}$ and anion $F ^{-}$, all have stable inert gas configuration. Thus, their electron affinity is almost zero. Hence, among the given, $O ^{-}$has the highest electron affinity.