試題詳解

12. Consider the following orderings.
 I. Al＜Si＜P＜Cl        II. Be＜Mg＜Ca＜Sr
III. I＜Br＜Cl＜F         IV. Na⁺ ＜Mg²⁺＜Al³⁺＜Si⁴⁺
Which of these give (s) a correct trend in ionization energy?
(A) III
(B) I, II
(C) I, IV
(D) III, IV
(E) I, III, IV