問題詳情
12. 設下列各數代表週期表元素的原子序，則其中哪一組為鹼土金屬(ⅡA)元素？
(A) 3，11，
(B) 4，12，
(C) 7，15，
(D) 9，18，35
(A) 3，11，
(B) 4，12，
(C) 7，15，
(D) 9，18，35
參考答案
答案：[無官方正解]
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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