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Oxygen-filled discharge tube glowing purple. cubic ( cP16) Oxygen is a chemical element; it has 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.
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The element and its compounds make up 49.2% by mass of the Earth’s crust, and about two-thirds of the human body. There are two key methods used to obtain oxygen gas. The first is by the distillation of liquid air. The second is to pass clean, dry air through a zeolite that absorbs nitrogen and leaves oxygen.
Living with home oxygen therapy is an integral part of your respiratory treatment. Oxygen therapy might take time to get used to - but you are not alone. Thousands of Canadians use oxygen therapy to breathe more easily, live longer, and make the most of each day. Learn how.
