Physics Unit30: Nuclear Physics and Radioactivity (id: e4819f21c)

admin

本题目来源于试卷: Physics Unit30: Nuclear Physics and Radioactivity，类别为 Generic Physics

[单选题]
An element with atomic nu*hch tgs6 2h/k8eb-v qhk1b,0eunl 8bm: j0 iaz7up5veber 6 undergoes $b-$ decay. Its atomic number is now

A. 7.
B. 6.
C. 5.
D. 2.


参考答案:  A


本题详细解析: 暂无