TED Talks
Ted: Ted Ed: Cobalt: Periodic Table of Videos
The team at Periodicvideos has created a TED-Ed Lesson for every element of the periodic table. This one is about cobalt. Take this lesson to learn about its role in color televisions. [1:42]
BBC
Bbc: Gcse Bitesize: Transition Metals, Alloys and Corrosion
The transition metals are placed in the center of the periodic table, between groups 2 and 3. They are generally hard and dense, and less reactive than the alkali metals. Iron, copper, silver and gold are important transition metals. A...