Physics Unit30: Nuclear Physics and Radioactivity (id: 04ff14276)

本题目来源于试卷: Physics Unit30: Nuclear Physics and Radioactivity，类别为 通用国际物理

[单选题]
The atomic mass unit sg+gm*al09fx(nop;bl va3 b )is 4oib mna0;-xvdefined as

A. the mass of a proton.
B. the mass of an electron.
C. the mass of a hydrogen-1 atom.
D. one twelfth the mass of a carbon-12 atom.


参考答案:  D


本题详细解析: 暂无

微信扫一扫，分享更方便