Among the unique chemical properties of oxygen are its ability to support respiration in plants and animals, and its ability to support combustion. In this lab, oxygen will be generated as a product of the decomposition of hydrogen peroxide. At 5 °C the solubility increases to 9.0 mL (50 percent more than at 25 °C) per liter for water and 7.2 mL (45 percent more) per liter for sea water. Oxygen is represented by the chemical symbol O. Oxygen is a strong oxidizing agent and has the second-highest electronegativity of all reactive elements, second only to fluorine. About three atoms out of 10,000 are oxygen, but because the mass of an oxygen atom is approximately 16 times that of a hydrogen atom, oxygen constitutes a larger fraction of the mass of the universe, though still only about 0.5 percent. The principal commercial source of selenium is as a by-product of copper refining; its major uses are in the manufacture of electronic equipment, in pigments, and in making glass.

It is occasionally found uncombined, accompanying native sulfur, but is more often found in combination with heavy metals (as copper, mercury, lead, or silver) in a few minerals. CC BY-SA 3.0. What is the chemical element for the symbol Nh?

This is called a diatomic gas. What is oxygen? Oxygen also exists as the allotrope ozone (O 3). As such, it readily forms compounds (notably, oxides) with almost all other elements. Oxygen is a member of the chalcogen group on the periodic table and is a highly reactive nonmetallic element. The most important source is underground deposits of very pure sulfur present in domelike geologic structures where the sulfur is believed to have been formed by the action of bacteria upon the mineral anhydrite, in which sulfur is combined with oxygen and calcium.

This bond has a bond order of two and is often simplified in descriptions as a double bond, or as a combination of one two-electron bond and two three-electron bonds. A relationship between the first three members of the group was recognized as early as 1829; tellurium was assigned its place by 1865, and polonium was discovered in 1898. It is a highly reactive substance and must be segregated from combustible materials. Several million tons of sulfur are produced each year, mostly for the manufacture of sulfuric acid, which is widely used in industry. The density of oxygen is 1.429 grams/liter. Oxygen and Corrosion of Steel Pipes - Oxygen concentration and temperature and the influence on corrosion of steel pipes; Oxygen Gas - Specific Heat - Specific heat of Oxygen Gas - O 2 - at temperatures ranging 175 - 6000 K; Pentane - Thermophysical Properties - Chemical, physical and thermal properties of pentane, also called n-pentane. Many of its properties make it very important to the composition and continuity of various systems throughout the universe. Triplet oxygen (not to be confused with ozone, O3) is the ground state of the O2 molecule. It is a colorless, tasteless, odorless air element that comprises 21 percent of the atmosphere and is found in water, most rocks and minerals, and in many organic compounds. oxygenA chemical element (symbol O) with an atomic number of 8 and atomic mass of 15.9994 amu. Boundless Learning Oxygen forms compounds by reaction with practically any other element, as well as by reactions that displace elements from their combinations with each other; in many cases, these processes are accompanied by the evolution of heat and light and in such cases are called combustions. Liquid oxygen may also be produced by condensation out of air, using liquid nitrogen as a coolant. Sulfur occurs in the uncombined state as well as in combination with other elements in rocks and minerals that are widely distributed, although it is classified among the minor constituents of the Earth’s crust, in which its proportion is estimated to be between 0.03 and 0.06 percent. Like selenium, it is less often found uncombined than as compounds of metals such as copper, lead, silver, or gold, and is obtained chiefly as a by-product of the refining of copper or lead. 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.

Elemental O2 only began to accumulate in the atmosphere after the evolutionary appearance of photosynthetic organisms, roughly 2.5 billion years ago. It is capable of mixing with all elements except inert gases and is particularly involved in combustion processes. CC BY-SA 3.0. Oxygen is toxic to obligate anaerobic organisms (organisms which need a lack of oxygen for survival), which were the dominant form of early life on Earth, until O2 began to accumulate in the atmosphere. Boundless vets and curates high-quality, openly licensed content from around the Internet. In the air, oxygen exists mostly as molecules each made up of two atoms (O2), although small amounts of ozone (O3), in which three atoms of oxygen make up each molecule, are present in the atmosphere. Oxygen is a strong oxidizing agent and has the second-highest electronegativity of all reactive elements, second only to fluorine. Physical properties are usually observed using our senses such as color, density, lightning, freezing point, boiling point, melting point, hardness, and smell. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. Chemical Properties of Oxygen At standard temperature and pressure (STP), two atoms of the element bind to form dioxygen, a colorless, odorless, tasteless diatomic gas with the formula O 2 . Oxygen group element, any of the six chemical elements making up Group 16 (VIa) of the periodic classification—namely, oxygen (O), sulfur (S), selenium (Se), tellurium (Te), polonium (Po), and livermorium (Lv). What are the Properties of […] The liquid and solid forms are a pale blue colour. It is much more reactive toward common organic molecules than is the triplet form of molecular oxygen. Modern version of the periodic table of the elements.

(adsbygoogle = window.adsbygoogle || []).push({}); Oxygen is an important part of the atmosphere and is necessary to sustain terrestrial life. Sulfur exists under ordinary conditions as a pale yellow, crystalline, nonmetallic solid; it is odourless and tasteless, combustible, and insoluble in water. The chemical properties of oxygen are given below; It present in gaseous oxygen form in normal temperature. 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. No large use for tellurium has been found. Our editors will review what you’ve submitted and determine whether to revise the article. Seawater contains about 0.09 percent sulfur in the form of sulfate. Wiktionary It is vital in industrial, medical and engineering settings. The gray, metallic form of the element is the most stable under ordinary conditions; this form has the unusual property of greatly increasing in electrical conductivity when exposed to light. It has some scientific applications as a source of alpha radiation. High-purity liquid O2 is usually obtained by the fractional distillation of liquefied air. The solubility of oxygen in water is temperature-dependent; it condenses at 90.20 K and freezes at 54.36 K. paramagneticExhibiting paramagnetism (the tendency of magnetic dipoles to align with an external magnetic field). It has resistance to flow – stickiness. Physical Properties Oxygen exists in all three forms - liquid, solid, and gas.

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