Chlorine

by Jean F. Blashfield

Published 1 November 2001
Explains what the chemical element chlorine is, and discusses its importance to humans.

Magnesium

by Jean F. Blashfield

Published 1 November 2001

Sulfur

by Jean F. Blashfield

Published 1 January 2001


Nitrogen

by Jean F. Blashfield

Published 1 January 1998
Discusses the origin, discovery, special characteristics, and use of nitrogen in such products as explosives and fertilizers.

Hydrogen

by Jean F. Blashfield

Published 1 January 1998
Presents the basic concepts of this central element of the universe.

Calcium

by Jean F. Blashfield

Published 1 January 1998
Presents the basic concepts of this metallic element which is found in the stone used to make buildings and streets and which is an important mineral needed by the body.

Potassium

by Jean F. Blashfield

Published 1 January 2001

Carbon

by Jean F. Blashfield

Published 1 January 1998
Presents the basic concepts of carbon, one of the most important chemical elements found in all living things.

Sodium

by Jean F. Blashfield

Published 1 January 1998
Discusses the origin, discovery, special characteristics, and uses of the sixth most abundant element in the Earth's crust.

Oxygen

by Jean F. Blashfield

Published 1 January 1998
Presents the basic concepts of oxygen, the most important chemical element in our lives and also the most abundant element in nature.

Sparks of Life

by Jean F. Blashfield

Published 1 November 2001