Physics Unit30: Nuclear Physics and Radioactivity (id: 6fde6b2fa)

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]
An element with atomic mass number2 :5s k fe7rgyvrz5jx4dk)cz1 of 14 and j:,rpnft2 .-e1qi g mpatomic number 6 has how many protons? r -,jiep2n gmt.qf:p1

A. 6
B. 8
C. 14
D. 20


参考答案:  A


本题详细解析: 暂无

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