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See also:

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

http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/1.html

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

http://scifun.chem.wisc.edu/chemweek/HYDROGEN/hydrogen.html

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

http://www.chemicalelements.com/elements/h.html

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

http://environmentalchemistry.com/yogi/periodic/H.html

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

http://www.c-f-c.com/specgas_products/hydrogen.htm

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

http://230nsc1.phy-astr.gsu.edu/hbase/hyde.html

» 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.

http://education.jlab.org/itselemental/ele001.html

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

http://periodic.lanl.gov/elements/1.html

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

http://www.lenntech.com/Periodic-chart-elements/H-en.htm

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

http://www.chemsoc.org/viselements/pages/hydrogen.html

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

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