» ChemGlobe: Oxygen - Electronic, thermal, and steric data along with basic information.
» ChemicalElements.com: Oxygen - Basic information, atomic structure, and table of isotopes.
» EnvironmentalChemistry.com: Oxygen - Atomic structure, chemical and physical properties, and table of nuclides.
» Especiál Gas Inc.: Oxygen - Numeric data, uses, and general information.
» It's Elemental: Oxygen - Basic physical and historical information.
» LANL: Oxygen - History, sources, forms, compounds, and isotopes.
» Lenntech: Oxygen - Physical data, chemical properties, and health effects.
» Oxygen - Data tables and historic information.
» Visual Elements: Oxygen - Animation, uses, physical information, and key isotopes.
» WebElements: Oxygen - Extensive information on history, uses, occurrence, compounds, and properties of the element.
» Wikipedia: Oxygen - Properties of the element, including its history, applications, and characteristics.
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