8O, 12Mg, 13AI, 17CI
A. CI−
B. O2−
C. Mg2+
D. AI3+
Correct Answer:
Option A = CI−
The following ions have the same electron configuration except 8O; 12Mg; 13AI; 17CI
![The electron configuration of carbon atom in its excited state is [ 6C]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "The electron configuration of carbon atom in its excited state is [ 6C]")
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