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 emi d+nn9y 3f.vg u-/zrbw; v/ )x/ldnmritted from an unstable nucleus, the atomic mass number of then)rm/x;dw/ vl nucleus

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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