Elements

Examines the characteristics, sources, and uses of the element tin, as well as tin's importance in our lives.

Explores the history of the chemical element oxygen and explains its chemistry, how it works in the body, and its importance in our lives.

Discusses the origin, discovery, special characteristics, and use of nitrogen in such products as explosives and fertilizers.

Discusses the origin, discovery, special characteristics, and uses of carbon.

Discusses the origin, discovery, special characteristics, and uses of iron.