Physics Unit30: Nuclear Physics and Radioactivity (id: 7b4c3b903)

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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]
When a neutron is emitted from an unstableb+ fw5yt2w nai03lmg0 nucleus, the atomic ma)u(ksx.ht ,17 mz(w;hc jygk ymdkb85ss number of the nuclh s7b;t85gm).k hj,cyu(wz1 yd(xkkmeus

A. increases by 1.
B. decreases by 1.
C. does not change.
D. none of the given answers


参考答案:  B


本题详细解析: 暂无