問題詳情
17. 原子序 34 之原子的價電子數為
(A)3
(B)4
(C)5
(D)6
(E)7。
(A)3
(B)4
(C)5
(D)6
(E)7。
參考答案
答案：D
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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