本题目来源于试卷: Physics Unit30: Nuclear Physics and Radioactivity，类别为 Generic Physics
[单选题]
When an alpha particle is emx kz/hlixql ;7t7 0cp.itted from an unstable nucleus, theiks6 (-c: luru atomic mass number of sci k:uu6 r(l-the nucleus
A. increases by 2.
B. decreases by 2.
C. increases by 4.
D. decreases by 4.
参考答案: D
本题详细解析:
暂无
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Post time 2024-1-22 01:01:29