問題詳情
7. 元素20A〔 
〕與元素17B〔 
〕，則當 A 與 B 化合時，可能的化學式為何？
(A) A3B2
(B) A2B3
(C) A2B
(D)AB2
(E)AB。
〕與元素17B〔 〕，則當 A 與 B 化合時，可能的化學式為何？ (A) A3B2
(B) A2B3
(C) A2B
(D)AB2
(E)AB。
參考答案
答案：D
難度：適中0.5
統計：A(0),B(0),C(0),D(2),E(0)
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