55:22
Transition metals
Transition metals are the largest group of elements on the periodic table. Segments in this program include Exploring Transition Metals (properties of the transition metals); Manganese: Strengthening Steel (why manganese is so useful in making steel...
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...