Radioactivity in terms of nuclear decay

Explain radioactivity in terms of nuclear decay and give some examples that we use industrially.

Please help my chem final is tomorrow!

radioactive decay is when an unstable isotope breaks down into a stable isotope releasing some type of high energy particle

there are different types of atomic decay
theres alpha decay where its nucleus breaks into a smaller more stable nucleus while releasing alpha radiation symbolized by ^4v2He+ as the particle resembles that
theres also beta decay and gamma decay which i dont remember off hand

I guess we use Uranium which we bombard to break it down into a heavy element and alpha radiation as it releases a high amount of energy also