Radioisotope

Imagine you're trying to get comfortable in your bed, but the blanket keeps bunching up and shifting until it finally settles flat. This is like a radioisotope, where the nucleus of the atom is unstable and releases energy in the form of radiation until it reaches a stable state. Just as the blanket needs to release tension and rearrange to find a comfortable position, the radioisotope releases energy to transform into a stable element.
Practice Version

Radioisotope: A chemical element that has an unstable nucleus and emits radiation during its decay to a stable form. Radioisotope. A radioisotope is a type of atom that changes over time by giving off energy, helping scientists study and use radiation in various fields.