See also:

• Science: Chemistry: Elements: Nonmetals  (4)
• Science: Technology: Energy: Hydrogen  (127)

ChemGlobe: Hydrogen: - Electronic, thermal, and steric data along with basic information.

Chemical of the Week: Hydrogen: - Equations for reactions between hydrogen and other substances.

ChemicalElements.com: Hydrogen: - Basic information, atomic structure, and table of isotopes.

EnvironmentalChemistry.com: Hydrogen: - Atomic structure, chemical and physical properties, and table of nuclides.

Especiál Gas Inc.: Hydrogen: - Numeric data, uses, and general information.

Hydrogen Energies and Spectrum: - 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.

It's Elemental: Hydrogen: - Basic physical and historical information.

LANL: Hydrogen: - Brief reference on the element includes discussion of the sources of hydrogen, its current uses, and potential for new energy applications.

Lenntech: Hydrogen: - Physical data, chemical properties, health and environmental effects.




Visual Elements: Hydrogen: - General and physical information, uses, and key isotopes.

Wikipedia: Hydrogen: - Properties of the element, including its history, applications, and characteristics.