Physics Unit30: Nuclear Physics and Radioactivity (id: 41c8fa7d0)

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 an alpha particle is emitted from an un 95dp-bipqrg-x 1nztu2x -e c8stable nuz :lycd+m+r; c 2xqjb3f/t8u kcleus, the atomic number of the nuc+:kzc8;ux2+/r ymlb qtj3 fcdleus

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

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