55:16
The actinide series
Most elements in the actinide series were created artificially; only thorium and uranium are found in nature. Segments in this program include "Exploring the Actinide Series" (properties of the actinides); "Uranium: Stealth Boomer" (the use of urani...
23:47
The periodic table
Much more than a list of elements, the periodic table is a snapshot of how matter is organized on Earth and throughout the universe. Divided into five sections, this program looks at the history and components of the periodic table: The History of t...