Physics Unit30: Nuclear Physics and Radioactivity (id: 0d46ebf59)

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]
When a neutron is emit7 )r2saqm1mcxod z;/pted from 3xtx( 5me1 cbw0y*fs gan unstable nucleus, the atomic mass number of the nucleuysfe* cwxg(m5t0 1 x3bs

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

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