Khan Academy: Chemistry: Half Life

Explain the importance of radioactive half-life as your high school biologists demonstrate the concept by performing a series of steps designed to simulate radioactive decay. Pupils use pennies to perform an experiment and gather data....

What is half-life and how can decay be used to date items? Viewers find out in this video that details half-life and radioactive decay, as well as the difference between alpha and beta decay.

Participate in a little chemistry Q and A! Part of a larger series on reactions, an informative lesson takes questions from viewers and crafts responses. The video explains how we arrive at an accurate half-life of a radioactive...

Does a radioactive cat have 18 half-lives? An understanding of half-life is important in both chemistry and biology, so start your young scientists off the right way — with the good foundation provided by a video that begins with a graph...

Scholars shake their way to understanding half-life with the help of candy. They observe and record which side candy lands on to graph the exponential decay in the fifth instructional activity of seven integrating chemistry and algebra....

Carbon dating is a real-life example of a first-order reaction. This video explains half-life in the context of radioactive decay. [12:28]

Definition of half-life and graphing the decay of phosphorus-32. Calculating how much phosphorus-32 remains after 57.2 days. [6:42]

Understand how to derive the half-life equation of a first-order reaction starting from the integrated rate law. [8:12]

An example problem shows how to find the rate constant k from the half-life of a first-order reaction. [6:10]

Recognize how to derive half-life equation of a second-order reaction starting from the integrated rate law. [7:04]