Niobium

Visual Elements: Oxygen Visual Elements: Oxygen- Animation, uses, physical information, and key isotopes. Lenntech: Oxygen Lenntech: Oxygen- Physical data, chemical properties, and health effects. EnvironmentalChemistry.com: Oxygen EnvironmentalChemistry.com: Oxygen- Atomic structure, chemical and physical properties, and table of nuclides. Especiál Gas Inc.: Oxygen Especiál Gas Inc.: Oxygen- Numeric data, uses, and general information. It's Elemental: Oxygen It's Elemental: Oxygen- Basic physical and historical information. WebElements: Oxygen WebElements: Oxygen- Information on history, uses, occurrence, compounds, and properties of the element. ChemicalElements.com: Oxygen ChemicalElements.com: Oxygen- Basic information, atomic structure, and table of isotopes. Wikipedia: Oxygen Wikipedia: Oxygen- Properties of the element, including its history, applications, and characteristics.