Physics Unit30: Nuclear Physics and Radioactivity (id: 79c794728)

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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 an alpha particle is emitted from an unstabc*qb8g 8 n).vf2 rvthwle nucleus, the atg1sne 5w i6qc-fhnn41 omic number of the nucleus fs nnq4-wc6gn1 e1i5h

A. increases by 2.
B. decreases by 2.
C. increases by 4.
D. decreases by 4.


参考答案:  B


本题详细解析: 暂无