Physics Unit30: Nuclear Physics and Radioactivity (id: 42e030263)

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

[单选题]
The atomic number and mass numbe vddjvrhc3q5cs3m 33z,.+ h knr for calcxj 4/;7bf7qeyylv)l4k9aou gium 39 are 20 and 39, respectively. Hou47e9;b7kj ly /4avg qyf )lxow many nucleons 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