9. 請問下列何者是正確的游離能(ionization energy)變化趨勢?
I. Al < Si < P < Cl II. Be < Mg < Ca < Sr III. I < Br < Cl < F IV. Na+ < Mg2+ < Al3+ < Si4+(A) III(B) I, II(C) I, III(D) I, III, IV