Question
The process requiring the absorptionof energy is
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Answer
d
Second electron affinity is zero for an element since already added electron repels existing electrons. Hence, it becomes difficult for an atom to take up another electron.
Second electron affinity is zero for an element since already added electron repels existing electrons. Hence, it becomes difficult for an atom to take up another electron.
Therefore, the process $O ^{-} \rightarrow O ^{2-}$ requires energy.
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