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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 an oxidizing agent that readily forms oxides with most elements as well as with other compounds. Oxygen is the most abundant element in Earth's crust, and after hydrogen and helium, it ...
- Oxygen (Disambiguation)
Computing. Oxygen XML Editor; Oxygen Games, a defunct video...
- Fluorine
Afrikaans; አማርኛ; Anarâškielâ; अंगिका; العربية; Aragonés;...
- Oxygen Therapy
Oxygen therapy, also referred to as supplemental oxygen, is...
- Allotropes of Oxygen
There are several known allotropes of oxygen.The most...
- Living Organisms
Etymology. The term "organism" (from the Ancient Greek...
- Organic Molecules
Methane (CH 4) is among the simplest organic compounds.....
- Carl Wilhelm Scheele
Carl Wilhelm Scheele (German:, Swedish: [ˈɧêːlɛ]; 9 December...
- Plants
Plants Temporal range: Mesoproterozoic–present Pha....
- Animals
Animals are multicellular, eukaryotic organisms in the...
- Abundance
The abundance of the chemical elements is a measure of the...
- Oxygen (Disambiguation)
El oxígeno elemental se produce por cianobacterias, algas y plantas y todas las formas complejas de vida lo usan para su respiración celular. Resulta tóxico para los organismos de tipo anaerobio obligado, las formas tempranas de vida que predominaban en la Tierra hasta que el O 2 comenzó a acumularse en la atmósfera.
- Oxígeno, O, 8
- No metales
- 15,9994 u
- Atmosphere
- Biosphere
- Hydrosphere
- Lithosphere
- Sources and Sinks
- Capacities and Fluxes
- Ozone
- See Also
The atmosphere is 21% oxygen by volume, which equates to a total of roughly 34 × 1018 mol of oxygen. Other oxygen-containing molecules in the atmosphere include ozone (O3), carbon dioxide (CO2), water vapor (H2O), and sulphur and nitrogen oxides (SO2, NO, N2O, etc.).
The biosphere is 22% oxygen by volume, present mainly as a component of organic molecules (CxHxNxOx) and water.
The hydrosphere is 33% oxygen by volume present mainly as a component of water molecules, with dissolved molecules including free oxygen and carbolic acids (HxCO3).
The lithosphere is 46.6% oxygen by volume, present mainly as silica minerals (SiO2) and other oxideminerals.
While there are many abiotic sources and sinks for O2, the presence of the profuse concentration of free oxygen in modern Earth's atmosphere and ocean is attributed to O2 production from the biological process of oxygenic photosynthesis in conjunction with a biological sink known as the biological pump and a geologic process of carbon burial involv...
The following tables offer estimates of oxygen cycle reservoir capacities and fluxes. These numbers are based primarily on estimates from (Walker, J. C. G.): More recent research indicates that ocean life (marine primary production) is actually responsible for more than half the total oxygen production on Earth. Table 2: Annual gain and loss of atm...
The presence of atmospheric oxygen has led to the formation of ozone (O3) and the ozone layer within the stratosphere: 1. O 2 + u v l i g h t ⟶ 2 O ( λ ≲ 200 nm ) {\\displaystyle \\mathrm {O_{2}+uv~light\\longrightarrow 2~O} \\qquad (\\lambda \\lesssim 200~{\\text{nm}})} 2. O + O 2 ⟶ O 3 {\\displaystyle \\mathrm {O+O_{2}\\longrightarrow O_{3}} } 3. O + O2 :-...
Oxygen ( French: Oxygène) is a 2021 French-language science fiction thriller film directed and produced by Alexandre Aja, from a screenplay by Christie LeBlanc. An American-French co-production, it stars Mélanie Laurent as a woman who awakens trapped in an airtight medical cryogenic unit, with Mathieu Amalric and Malik Zidi in supporting roles.
- May 12, 2021
- Rob
Oxygen is a part of water, which all known life needs to live. Algae, cyanobacteria and plants make the Earth's oxygen gas by photosynthesis. They use the Sun 's light to get hydrogen from water, giving off oxygen. At the top of the Earth's atmosphere is ozone ( O. 3 ), in the ozone layer.
- (O₂), gas: colourless, liquid and solid: pale blue
- 46%
Ciclo del oxígeno. Esquema del ciclo del oxígeno. El ciclo del oxígeno se refiere al movimiento circulatorio del oxígeno en la Tierra. Se trata de un ciclo biogeoquímico gaseoso, la importancia del ciclo del oxígeno radica en lo imprescindible que es este elemento para la vida en el planeta. Al respirar, los animales y los seres humanos ...
Singlet oxygen, systematically named dioxygen (singlet) and dioxidene, is a gaseous inorganic chemical with the formula O=O (also written as 1. [O. 2] or 1. O. 2 ), which is in a quantum state where all electrons are spin paired. It is kinetically unstable at ambient temperature, but the rate of decay is slow.
