本题目来源于试卷: Half-life and decay constant，类别为 美国物理杯赛(Physics Bowl)
[单选题]
A hypothetical radioactive substkbduxoi .720uga;6: zowp g,aance Aaptinh3hqh9 j nv3w1 dw7-y ywsf;3uium decays via alpha-emission into Physicsbowlium. The decay consh qh 3fuv7dyh;3 j yww3s1-nw9tant for this alpha-emission is 20 $s^{-1}$.
12.41: Which one of the following statements correctly compares Physicsbowlium to Aaptinium?
A. Physicsbowlium has 4 fewer protons and 2 fewer neutrons than Aaptinium.
B. Physicsbowlium has 4 fewer neutrons and 2 fewer protons than Aaptinium.
C. Physicsbowlium has 2 fewer protons and 2 fewer neutrons than Aaptinium.
D. Physicsbowlium has 4 fewer protons than, and the same number of neutrons as, Aaptinium.
E. Physicsbowlium has 2 fewer protons than, and the same number of neutrons as, Aaptinium.
参考答案: C
本题详细解析:
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