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  1. en.wikipedia.org › wiki › OxygenOxygen - Wikipedia

    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.

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    An oxygen concentrator is recommended if you need to have oxygen for most of the day (including when you're asleep). The machine is about the size of a bedside table and plugs into an electrical socket.

    Oxygen cylinders will probably be prescribed if you only need oxygen for a short time – for example, if you need to relieve sudden periods of breathlessness.

    It may be possible to use a small, portable oxygen cylinder outside your house or when moving around at home. This is called portable oxygen or ambulatory oxygen. Most portable oxygen cylinders weigh around 2-3kg and are small enough to fit inside a small backpack or shopping trolley. This size cylinder holds up to 3 hours' worth of oxygen. Portabl...

    Learn about home oxygen therapy, a treatment for people who do not have enough oxygen in their blood. Find out how to get assessed, what devices and methods are available, and how to use oxygen safely.

  2. Jun 25, 2024 · 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.

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  4. Oxygen accounts for about 23% of the atmosphere's mass with pairs of oxygen atoms stuck together to make dioxygen molecules, but it's not just in the air, we breathe. Overall, it's the most abundant element on the earth's surface and the third most abundant in the universe after hydrogen and helium.

  5. Oxygen is a chemical element. It has the symbol O 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 called oxygen.

  6. Oxygen should be regarded as a drug. It is prescribed for hypoxaemic patients to increase alveolar oxygen tension and decrease the work of breathing. The concentration of oxygen required depends on the condition being treated; the administration of an inappropriate concentration of oxygen can have serious or even fatal consequences.

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