Oxygen is a chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and a potent oxidizing agent that readily forms oxides with most elements as well as with other compounds.

Oxygen, a colorless, odorless, tasteless gas essential to living organisms, being taken up by animals, which convert it to carbon dioxide; plants, in turn, utilize carbon dioxide as a source of carbon and return the oxygen to the atmosphere.

Oxygen | O2 | CID 977 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.

Learn about oxygen, the most abundant element in the Earth's crust and atmosphere, and its role in photosynthesis, respiration and chemistry. Find out how oxygen was discovered, how it is obtained, and what are its physical and chemical properties.

Oxygen is a colorless, tasteless and odorless gas. It readily dissolves in water, and more conveniently in freshwater as compared to seawater. The freezing point of oxygen is −218.79 °C, and it condenses at −182.95 °C. Oxygen, in both of its liquid and solid state, appear as clear, sky-blue color compound.

Learn about oxygen, a chemical element with the symbol O and atomic number 8. Find out its history, properties, uses, and role in living things and the atmosphere.

Oxygen is a colourless, odourless, tasteless gas that constitutes 21% of air and 46% of Earth's crust. It is essential for respiration, photosynthesis, combustion, and many chemical compounds. Learn more about its history, discovery, and applications.

Oxygen is a chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and...

Learn about oxygen, a colorless and odorless gas that is essential for life and widely used in industry. Find out its symbol, isotopes, atomic data, biological role, cost, and how it was discovered by Priestley, Scheele and Lavoisier.