Radioactivity & Nuclear Reactions

Wondering how nuclear fusion differs from fission? Discover how energy is produced when two small atoms are fused together and how fusion might be harnessed.

In this introductory lesson, review the development of our understanding of atomic structure and basic physics over the last two hundred years.

Get ready to discover why some isotopes are radioactive, and what occurs in alpha, beta, and gamma decay. Also, learn to draw and interpret Feynman diagrams!

Nuclear fission is what happens in nuclear power stations and atomic bombs. The process for such massive release of energy is covered in the physics lesson!

What happens when the nucleus of an unstable isotope breaks down? In physics, this is called radioactive decay, a concept covered in this science lesson!