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