oxygenˈɒk sɪ dʒən
oxygen (n)
- plural
- oxygens
English Definitions:
oxygen, O, atomic number 8 (noun)
a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust
oxygen (Noun)
A chemical element (symbol O) with an atomic number of 8 and relative atomic mass of 15.9994.
oxygen (Noun)
Molecular oxygen (O), a colorless, odorless gas at room temperature.
oxygen (Noun)
A mixture of oxygen and other gases, administered to a patient to help him or her to breathe.
oxygen (Noun)
An atom of this element.
Oxygen
Oxygen is a chemical element with symbol O and atomic number 8. Its name derives from the Greek roots ὀξύς and -γόνος, because at the time of naming, it was mistakenly thought that all acids required oxygen in their composition. At standard temperature and pressure, two atoms of the element bind to form dioxygen, a colorless, odorless, tasteless diatomic gas with the formula O2. This substance is an important part of the atmosphere, and is necessary to sustain most terrestrial life. Oxygen is a member of the chalcogen group on the periodic table and is a highly reactive nonmetallic element that readily forms compounds with most elements except the noble gases Helium and Neon. Oxygen is a strong oxidizing agent and only fluorine has greater electronegativity. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium and the most abundant element by mass in the Earth's crust, making up almost half of the crust's mass. Oxygen is too chemically reactive to remain a free element in Earth's atmosphere without being continuously replenished by the photosynthetic action of living organisms, which use the energy of sunlight to produce elemental oxygen from water. Free elemental O2 only began to accumulate in the atmosphere about 2.5 billion years ago about a billion years after the first appearance of these organisms. Diatomic oxygen gas constitutes 20.8% of the volume of air.
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"oxygen." Kamus.net. STANDS4 LLC, 2022. Web. 5 Jul 2022. <https://www.kamus.net/english/oxygen>.
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