Basic information, atomic structure, and table of isotopes.

Atomic structure, chemical and physical properties, and table of nuclides.

Numeric data, uses, and general information.

Basic physical and historical information.

History, sources, natural compounds, and ammonia.

Physical data, chemical properties, health and environmental effects.

Data tables and historic information.

Explains the process by which molecular nitrogen is reduced to form ammonia.

Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).

Animation, uses, physical information, and key isotopes.

Extensive information on history, uses, occurrence, compounds, and properties of the element.

Properties of the element, including its history, applications, and characteristics.