Answer:atomic and mass number
Step-by-step explanation:
Radioactive decay process is a type of process in which a less stable nuclei decomposes to a stable nuclei by releasing some radiations or particles like alpha, beta particles or gamma-radiations. The radioactive decay follows first order kinetics.
General representation of a radioactive nuclide is given as:
where,
Z represents Atomic number
A represents Mass number
X represents the symbol of an element
Thus atomic and mass numbers are shown in the symbol for a radioactive nuclide.