
Oxygen - Wikipedia
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.
Blood Oxygen Level: Normal and Dangerous Readings
2024年6月13日 · Your blood oxygen level—sometimes referred to as SpO2—measures how much oxygen is circulating in your bloodstream. There are many ways to measure blood …
OXYGEN Definition & Meaning - Merriam-Webster
The meaning of OXYGEN is a chemical element with atomic number 8 that constitutes 21 percent of the Earth's atmosphere, that is capable of combining with all elements except some noble gases, that is active in physiological processes of almost all known organisms, and that is involved especially in combustion —often used before another noun.
What is the difference between O & O2 - Chemistry Stack Exchange
2017年1月10日 · O is a singular oxygen atom. O 2 is a molecule made of two oxygen molecules. Our atmosphere is made of mostly O 2, which our bodies have evolved to breathe. We breathe in O 2 and cellular respiration requires it (C 6 H 12 O 6 +6O 2 →6CO 2 +6H 2 O). O is oxygen, while O 2 is dioxygen.
Oxygen | O2 | CID 977 - PubChem
Oxygen is an element displayed by the symbol O, and atomic number 8. It is an essential element for human survival. Decreased oxygen levels may be treated with medical oxygen therapy.
Oxygen | Discovery, Symbol, Properties, Uses, & Facts | Britannica
2025年3月25日 · Oxygen is a colourless, odourless, 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 | English meaning - Cambridge Dictionary
Plants are the main source of atmospheric oxygen. The symbol for oxygen is O2. Broken bones, organ damage, shock, lack of oxygen, and extreme cold all reduce your chances of survival. Laughing is good for your brain and your heart because they need a lot of oxygen to work well.
Oxygen - Simple English Wikipedia, the free encyclopedia
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.
Oxygen Definition, Facts, Symbol, Discovery, Property, Uses
Oxygen (pronunciation: OK-si-jen) is a colorless element that belongs to the group of Chalcogens in the periodic table, and it is represented by the chemical symbol O [1, 2, 3]. A highly reactive non-metal, it can easily form oxides with most of the other elements and their compounds [3].
Blood Oxygen Level: What It Is & How To Increase It
2022年2月18日 · Your blood oxygen level (blood oxygen saturation) is the amount of oxygen that's circulating in your blood. It can be measured with a blood test or a pulse oximeter.