Oxygen is the most common chemical element found on or in Earth.  He found that a candle burning in a closed container made the water rise to replace a fourteenth of the air's volume before it went out. What Are Other Ways To Wish Someone A Merry Christmas? Why Is “Christmas” Abbreviated As “Xmas”? The New Dictionary of Cultural Literacy, Third Edition Photosynthesis takes hydrogen from water using energy from sunlight, which gives off oxygen gas. Oxygen is a non-metal element and is found naturally as a molecule. When concentrated oxygen and fuels are brought close together, a slight ignition can cause a huge fire. It is one of the main elements that make up air, and it is necessary for the survival of all plants and animals. Oxygen is the chemical element with the symbol O and atomic number 8. ), Lavoisier renamed "vital air" to "oxygène", from Greek words meaning "sour making" or "producer of acid".  His findings were published in 1775. A small steel tank of 16 liters water capacity with a working pressure of 139 bar (2015 psi) holds about 2150 liters of gas and weighs 28 kilograms (62 lb) empty. Oxygen therapy is prescribed for people who can’t get enough oxygen on their own. This bond can be called many things, but simply called a covalent double bond. The largest contributor to the oxygen cycle is photosynthesis, a process in which plants use carbon dioxide, light and water to produce oxygen from carbon dioxide. Priestley is usually thought to be the main discoverer because his work was published first (although he called it "dephlogisticated air", and did not think it was a chemical element). It is the most common oxide on Earth. This gas is often just called oxygen. He was the first person to say it was a chemical element. oxygen meaning: 1. a chemical element that is a gas with no smell or colour. He was also right about how it helps combustion work. These bonds give oxides (for example iron reacts with oxygen to give iron oxide). , Because of oxygen's high electronegativity, it makes chemical bonds with almost all other chemical elements. This is then changed to ethylene glycol, which is used to make many products such as antifreeze and polyester (these can then be turned into plastics and fabrics).  Philo thought this was because the air was turned into the classical element fire. O2 has a bond length of 121 pm and a bond energy of 498 kJ/mol Because of its energy, O2 is used by complex life like animals. In 1786, the French chemist Antoine Lavoisier coined a term for the element, Coronavirus Hit Latinos Harder Thanks to a Perfect Storm of Disparities, How Earth’s Climate Changes Naturally (and Why Things Are Different Now), The steroid dexamethasone is the first drug shown to reduce COVID-19 deaths, Minecraft’s big bees don’t exist, but giant insects once did, A Guide to the Scientific Knowledge of Things Familiar. When a person engages in high levels of physical activity, the body cannot distribute oxygen to the cells at a sufficiently rapid pace to keep up with the oxygen demand. Carbon dioxide consists of carbon and oxygen. It absorbs ultraviolet radiation, which means less radiation reaches ground level. to 49.2% of the Earth's crust as part of oxide compounds like silicon dioxide and other compounds like carbonates. Living things give it off during respiration.. Oxygen - What does oxygen stand for? The lungs are the main organ to do this. Oxygen gas is very reactive and can react with many other elements. It is one of the most important elements on planet Earth. Oxygen is very reactive and must be kept away from anything that can burn. Oxygen saturation is the fraction of oxygen-saturated hemoglobin relative to total hemoglobin (unsaturated + saturated) in the blood.The human body requires and regulates a very precise and specific balance of oxygen in the blood. Define oxygen debt.  The same thing happened when a live mouse was put into the box. Dictionary.com Unabridged  In 1805, Joseph Louis Gay-Lussac and Alexander von Humboldt showed that water is made up of two hydrogen atoms and one oxygen atom. About 99.7% of oxygen is the 16O isotope. , Breathing pure O2 in space suits causes no damage because there is a lower pressure used. Diatomic oxyg… The American Heritage® Science Dictionary , J. J. Becher came up with the theory in 1667, and Georg Ernst Stahl added to it in 1731. We now call this oxygen (O2). ABOUT US.  He wrote that air was made up of two gases. , Materials that leave very little residue when they burn, like wood or coal, were thought to be made mostly of phlogiston. Oxides are made when metal elements react with oxygen, such as iron oxide, which is known as rust. Many organic compounds have oxygen in them. Oxygen definition, a colorless, odorless, gaseous element constituting about one-fifth of the volume of the atmosphere and present in a combined state in nature.  The phlogiston theory stated that all combustible materials were made of two parts.  The Apollo 1 crew were all killed by a fire because the air of the capsule had a very high amount of oxygen. All rights reserved. French chemist Antoine Lavoisier later said he had discovered the substance as well. Priestley visited him in 1774 and told him about his experiment. Their decay proceeded without a ready supply of oxygen, producing hydrocarbons like methane instead of oxygen-bearing molecules. Describe 2020 In Just One Word? Ozone (O3) is very reactive and damages the lungs when breathed in. If the temperature is raised still higher, or the pressure is reduced, oxygen is given off and the oxide is once more formed.  It only exists in extreme conditions when a lot of pressure is put onto O2. This definition is the opposite of the oxygen definition, so it may cause confusion. The other main method of making oxygen is by passing a stream of clean, dry air through a pair of zeolite molecular sieves. In the air, two oxygen atoms usually join to make dioxygen (O2), a colourless gas. When there is the same amount of air and water, there is one molecule of O2 for every 2 molecules of N2 (a ratio of 1:2). O2 O2 is Gospel singer Tonéx's second major release. Published by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All plants and animals need oxygen in order to live. The Most Surprisingly Serendipitous Words Of The Day, The Dictionary.com Word Of The Year For 2020 Is …. It reacts very readily with oxygen by burning smokelessly, with carbon dioxide and water as its byproducts. 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