A) \[L{{i}^{+}}\]
B) \[M{{g}^{+}}\]
C) \[A{{l}^{+}}\]
D) Ne
Correct Answer: A
Solution :
In I-A group elements after removing an electron they gained stable electronic configuration. So, the removal of second electron from the outermost orbit is not easily possible and require more amount of energy. So, second ionization potential of I-A group elements is highest in the period. e.g., \[{{\,}_{3}}Li=1{{s}^{2}},2{{s}^{1}}\](unstable configuration)\[L{{i}^{+}}=1{{s}^{2}},2{{s}^{0}}\] (stable configuration)
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