55:21
The lanthanide series
Formerly called rare-earth elements, the lanthanides are neither rare in abundance nor, strictly speaking, are they "earth." Segments in this program include Exploring the Lanthanide Series (properties of the lanthanides); Lanthanum: Movie Magic (ho...
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...