A) \[[Ar]\,4{{s}^{1}}\]
B) \[[Ne]\,2{{s}^{2}}3{{p}^{6}}\]
C) \[[Ne]\,3{{s}^{2}}\]
D) None of these
Correct Answer: B
Solution :
Mg has only two electrons in the 3s-orbital and hence its I.E. is lowest, i.e. it has the maximum tendency to form di-positive ions.
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