問題詳情
19. A、B、C、D、E 五種元素在週期表中位置如下，已知 B 的原子序為 n，則五種元素原子序之和可能為
(A)5n＋6
(B)5n＋8
(C)5n＋10
(D)5n＋16
(E)5n＋18。
(A)5n＋6
(B)5n＋8
(C)5n＋10
(D)5n＋16
(E)5n＋18。
參考答案
答案：C
難度：非常困難0.0769231
統計：A(1),B(1),C(1),D(3),E(1)
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