Oxygen is a chemical element; it has 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.

Mar 28, 2025 · 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.

Life on Earth now depends on oxygen because all living things need it for respiration and producing energy [1]. Since gaseous oxygen is soluble in water, aerobic bacteria can survive in lakes, rivers, and oceans [1]. Interesting Facts. Oxygen liquefies at -183.0 °C and can cause frostbite after skin contact [8].

Oxygen is a chemical element. It has the symbol O, on the periodic table and atomic number 8. It is the third most common element in the universe, after hydrogen and helium. Oxygen is more than a fifth of the Earth's atmosphere by volume. In the air, two oxygen atoms usually join to make dioxygen (O 2), a colourless gas. This gas is often just ...

Sep 29, 2014 · Oxygen is the third most abundant element in the universe, according to the Thomas Jefferson National Accelerator Facility. However, its reactivity made it relatively rare in early Earth's...

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.

Mar 30, 2025 · Oxygen's unique utility comes down to quantum physics. Oxygen in its normal ground state can only accept electrons in the same spin state, not as an electron pair, which is the usual currency of ...

May 21, 2015 · Oxygen’s unique chemical and physical properties make it indispensable to science and technology. Chemical Properties: Oxygen readily forms oxides, peroxides, and superoxides and participates in combustion, corrosion, and redox reactions. Atomic Properties: Oxygen is a nonmetal, highly electronegative (3.44 on the Pauling scale), and reactive.

oxygen, Gaseous chemical element, chemical symbol O, atomic number 8. It constitutes 21% (by volume) of air and more than 46% (by weight) of Earth’s crust, where it is the most plentiful element. It is a colourless, odourless, tasteless gas, occurring as the diatomic molecule O 2.