55:22
Alkaline earth metals
Almost as unstable as alkali metals, soft and silvery alkaline earth metals react easily with water. Segments in this program include Exploring Alkaline Earth Metals (properties of the alkaline earth metals); Calcium: Building Bones (the relationshi...
26:13
Metals
On the periodic table, three-quarters of all the elements are classified as one sort of metal or another. Divided into five sections, this program provides a thorough overview of metals: Metals in Our World (includes iron, lithium, magnesium, mercur...