Physics Unit30: Nuclear Physics and Radioactivity (id: 41b241da3)

本题目来源于试卷: Physics Unit30: Nuclear Physics and Radioactivity，类别为 通用国际物理

[单选题]
An atom's mass number 6e hj7r3vzz),q.y v r9zjp*sris detvnbh5ql5jt ,9vgg l46ermined by the number of

A. neutrons in its nucleus.
B. nucleons in its nucleus.
C. protons in its nucleus.
D. alpha particles in its nucleus.


参考答案:  B


本题详细解析: 暂无

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