The term "parent atom" is not a standard term in nuclear physics or chemistry. It's likely you're thinking of the term "parent nuclide" or "parent isotope".

Here's the breakdown:

* Nuclide: A specific atom characterized by its number of protons (atomic number) and neutrons (neutron number).

* Isotope: Atoms of the same element (same number of protons) but with different numbers of neutrons.

Parent Nuclide/Isotope: In the context of radioactive decay, the parent nuclide/isotope is the original, unstable atom that undergoes decay. It transforms into a daughter nuclide/isotope, which is a more stable atom.

Example:

Carbon-14 (¹⁴C) is a radioactive isotope. It undergoes beta decay and transforms into Nitrogen-14 (¹⁴N). In this case:

* Parent nuclide/isotope: ¹⁴C (carbon-14)

* Daughter nuclide/isotope: ¹⁴N (nitrogen-14)

Key Points:

* The parent atom is the starting point of radioactive decay.

* The daughter atom is the product of the decay process.

* The decay process often involves the emission of particles like alpha particles, beta particles, or gamma rays.

If you provide more context about where you encountered the term "parent atom," I might be able to provide a more specific answer.