Provides information about the chemical element lead, explaining what it is, its characteristics, where it is found, how it was discovered, and how it is extracted and used.
Provides information about the chemical element chlorine, explaining what it is, its characteristics, where it is found, how it was discovered, and how it is extracted and used.
Provides information about the chemical element cobalt, explaining what it is, its characteristics, where it is found, how it was discovered, and how it is extracted and used.
Describes the properties of the element mercury and covers its history, its place in mythology, its uses, places where it is found, and mining and refining. Also discusses chemical reactions.