Here's the breakdown:

* Radioactive Decay: Radioactive isotopes (also called radioisotopes) are unstable atoms that undergo radioactive decay. This means they spontaneously transform into a different element or isotope, releasing energy in the process.

* Parent and Daughter Isotopes: In this process, the original radioactive atom is called the parent isotope. The new atom formed after decay is called the daughter isotope.

Example: Carbon-14 (parent isotope) decays into Nitrogen-14 (daughter isotope) through beta decay.

Important Points:

* Different Decay Modes: Different radioactive decay modes (alpha, beta, gamma) produce different daughter isotopes.

* Decay Chains: Some isotopes may decay into daughter isotopes that are themselves radioactive, leading to a chain of decays until a stable isotope is reached.

How Daughter Isotopes are Used:

* Radiometric Dating: The ratio of parent to daughter isotopes can be used to determine the age of rocks, fossils, and other materials.

* Medical Imaging and Treatment: Radioactive isotopes are used in medical imaging techniques like PET scans and in cancer therapy.

Let me know if you have any other questions about isotopes or radioactive decay!