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en.wikipedia.org/wiki/Oxygen

Oxygen is the 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 an oxidizing agent that readily forms oxides with most elements as well as with other compounds.By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium.At standard temperature and pressure, two ...

www.livescience.com/28738-oxygen.html

Facts About Oxygen. By Stephanie Pappas 29 September 2014. ... Oxygen has eight total electrons — two orbit the nucleus in the atom's inner shell and six orbit in the outermost shell. The ...

www.thoughtco.com/oxygen-facts-606572

Oxygen is one of the best-known gases on the planet, largely because it is so important for our physical survival. It is a crucial part of Earth's atmosphere and hydrosphere, it's used for medical purposes, and it has a profound effect on plants, animals, and metals.

www.rsc.org/periodic-table/element/8

In particular, it's the atom that links together the phosphate groups in the energy-carrying molecule ATP. Oxygen is obviously pretty useful for keeping us going, but is also widely used in industry as an oxidant, where it can give up some of that solar energy captured by plant and those cyanobacteria.

factslegend.org/15-surprising-oxygen-facts-you-probably-didnt-know

When oxygen molecules get excited, they split into atoms. These atoms then start emitting photons and hence, lose energy. When they start losing photons, they produce light. Surprising Oxygen Facts You Must Know: 11-15. 11. Oxygen is a non-metallic element. But of all non-metallic elements, it is actually the most reactive. 12.

www.britannica.com/science/oxygen

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. Oxygen forms compounds by reaction with practically any other element.

www.softschools.com/facts/periodic_table/oxygen_facts/181

Interesting Oxygen Facts: One fifth of the Earth's atmosphere is made up of oxygen and is the third most abundant element in the universe by mass. Oxygen is the most abundant element by mass in the Earth's biosphere.

www.ducksters.com/science/chemistry/oxygen.php

Where is oxygen found on Earth? Oxygen is found all around us. It is one of the most important elements on planet Earth. Oxygen makes up around 21% of the Earth's atmosphere and 50% of the mass of the Earth's crust. Oxygen is one of the atoms that makes up water (H 2 O). Oxygen is an important element to life on Earth.

www.thoughtco.com/fun-oxygen-facts-for-kids-3975945

Oxygen is one of those elements you simply can't live without. Here are fun oxygen facts for kids (or anyone interesting in this essential element).

education.jlab.org/itselemental/ele008.html

Large amounts of oxygen can be extracted from liquefied air through a process known as fractional distillation. Oxygen can also be produced through the electrolysis of water or by heating potassium chlorate (KClO 3). Oxygen is a highly reactive element and is capable of combining with most other elements.