The following are isoelectronic ions except?

A. Na+ B. Mg²+ C. Si²+ D. O²+ Correct Answer: Option C – Si²+ Explanation Two or more ions are said to be isoelectronic if they have the same electronic structure and the same number of valence electrons. Na+ = 10 electrons = 2, 8 Mg²+ = 10 electrons = 2,8 O²− =...

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