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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) 3,11,19 (B) 4,12,20 (C) 7,15,33 (D) 9,18,35
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) 3,11,19
(B) 4,12,20
(C) 7,15,33
(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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