Physics Unit30: Nuclear Physics and Radioactivity (id: b74b7e3fc)

本题目来源于试卷: Physics Unit30: Nuclear Physics and Radioactivity，类别为 国际高中通用物理

[单选题]
The atomic number and mass number ubav f(cf m+u dg-jw8t4a0i/(je72z zfor calcium 39k8./ybq:6*ai 8f:td0 w2 w r yjb0znp1pndpmm are 20 and 39, respectively. How many nucleonw 01pb2bdr:yknm *qpp i.m8 0/6df a t8wznyj:s are in one atom?

A. 1
B. 19
C. 20
D. 39


参考答案:  D


本题详细解析: 暂无

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