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EnvironmentalChemistry.com: Krypton - http://environmentalchemistry.com/yogi/periodic/Kr.html
Atomic structure, properties, and table of nuclides. |
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Visual Elements: Krypton - http://www.chemsoc.org/viselements/pages/krypton.html
General and physical information, uses, key isotopes, and ionisation energies. |
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Lenntech: Krypton - http://www.lenntech.com/Periodic-chart-elements/Kr-en.htm
Physical data, chemical properties, health and environmental effects. |
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Especiál Gas Inc.: Krypton - http://www.c-f-c.com/specgas_products/krypton.htm
Numeric data, uses, and general information. |
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ChemGlobe: Krypton - http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/36.html
Electronic, thermal, and steric data along with an isotope table. |