Answer:
The answer is C.
"The atomic number and mass number."
Explanation:
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The atomic number and the mass number are numbers shown in the symbol for a radioactive nuclide (Option C).
The atomic number is referred to the atomic charge that has a given nucleus, which is symbolized as Z.
In conclusion, the atomic number and the mass number are numbers shown in the symbol for a radioactive nuclide (Option C).
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