Of the following elements, which has the largest first ionization energy?
A) Sr
B) Ca
C) Rb
D) Ba
E) K

Name: Of the following elements, which has the largest first ionization energy? A) Sr B) Ca C) Rb D) Ba E) K
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Question

Quizplus · Accepted Answer

Calcium (Ca) has the largest first ionization energy among the given elements because it is higher up in the same group as Sr and Ba, and it is to the right of K and Rb in the periodic table, leading to a stronger effective nuclear charge and less electron shielding.

Of the Following Elements, Which Has the Largest First Ionization