Physics Unit30: Nuclear Physics and Radioactivity (id: 45797cfda)

[单选题]
If an atom's atomic number is gnd;7ieulqh+ nk 2ke(x.;toy9 iven by ; :igfufaa7 r:Z, its atomic mass by A, and its neutron number by N, whiiaga;7f: fu:rch of the following is correct?

A. N = A + Z
B. N = Z - A
C. N = A - Z
D. none of the given answers


参考答案:  C


本题详细解析: 暂无