Science Struck
Science Struck: Half Life in Nuclear Chemistry
Explains what is meant by the half-life of a radioactive element and how it is calculated.
Nobel Media AB
The Nobel Prize: The Nobel Prize in Chemistry 1908
At this site read about Ernest Rutherford (1871-1937 CE), the scientist who was awarded the Nobel Prize in Chemistry, "for his investigations into the disintegration of the elements, and the chemistry of radioactive substances." This...
Khan Academy
Khan Academy: Radioactive Decay Types Article
This article from Khan Academy provides information about radioactive decay. This information is intended for the Class 12 Physics Course (India).