Physics Unit30: Nuclear Physics and Radioactivity (id: 4db66d3d4)

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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]
The number of proton dl8lnihs;7u m4*0p 8s+fcvv rsdin1er c)hbwa1 rbb7hy0 vse8* 9l0g0 in an atom is

A. zero.
B. equal to the number of neutrons.
C. equal to the number of electrons.
D. the same for all elements.


参考答案:  C


本题详细解析: 暂无