Interesting information including: average annual dosage, radioactivity in space, in the human body, and in the oceans.

Click to read different historical documents in chemistry related to the history of the study and discovery of radioactivity.

Kids learn about the science of radioactivity and radiation in chemistry including radioactive decay, types, measurements, half-life, and the dangers.

A basic explanation of beta decay.

This is a good source for getting an in-depth description of using radioactive decay to measure the ages of rocks. In addition to describing the process of radiometric dating, this resource also includes a geologic time scale and four...

A good illustration and a simple explanation of gamma-ray decay.

In this interactive, learn about sources of both beneficial and harmful radiation which exist in many forms all around us.