A) \[{{O}^{-}}\]
B) \[{{F}^{-}}\]
C) \[C{{l}_{2}}\]
D) \[{{F}_{2}}\]
Correct Answer: A
Solution :
Molecules of \[{{F}_{2}},C{{l}_{2}}\] 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.
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