CK-12 Foundation
Ck 12: Half Life
[Free Registration/Login may be required to access all resource tools.] In this module, students will explore the radioactive decay process in terms of balanced nuclear equations to discover the concept of half-life.
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.
Science Struck
Science Struck: List of Radioactive Elements
Learn about radioactivity, the different types of radioactive decay, isotopes, and half-life of a radioactive element. Includes a long chart listing radioactive elements, atomic number and mass number, decay type, and length of half-life.
Department of Defense
Do Dea: Ap Calculus: Radioactivity and Half Life [Pdf]
Apply the Law of Exponential Change to solve a "real-world" science problem. Formulas and examples are provided. Great review for the AP Calculus test!
PBS
Pbs Learning Media: The Dating Game: Radioactive Carbon
In this media-rich essay from the NOVA: "Mystery of the First Americans" Web site, learn about the atomic structure of radioactive carbon and how it can be used to determine the age of organic remains, such as bones and teeth.
Science Struck
Science Struck: How Does Radioactive Decay Work?
Explains the processes of radioactive decay in primary and secondary modes.
American Geosciences Institute
American Geosciences Institute: Earth Science Week: Dating Popcorn
In this activity, students use popcorn to simulate the process scientists use to date layers in an ice core.