A) \[Cu\to C{{u}^{+}}\]
B) \[Br\to B{{r}^{-}}\]
C) \[I\to {{I}^{-}}\]
D) \[Li\to L{{i}^{+}}\]
Correct Answer: A
Solution :
In \[Cu\] it has completely filled d-orbital so highest energy is absorbed when it convert in \[C{{u}^{+}}\]ion.
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