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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。
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。
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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