Science: Chemistry: Elements: Hydrogen

Equations for reactions between hydrogen and other substances.

The Bohr model for an electron transition in hydrogen between quantized energy levels with different quantum numbers n yields a photon by emission with quantum energy.

Basic physical and historical information.

Basic information, atomic structure, and table of isotopes.

Numeric data, uses, and general information.

Data tables and historic information.

General and physical information, uses, and key isotopes.

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

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

Physical data, chemical properties, health and environmental effects.