File:Vial of glowing ultrapure oxygen.jpg

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English: Oxygen, a very reactive gas, is the most abundant element on Earth. It is part of very many natural compounds, in minerals as in organic material and of course in water, H2O. Combustion usually is a reaction of a material with oxygen. Elemental oxygen in the form of O2 is to 21% part of our air and is used by humans and animals for respiration. It is produced by plants doing photosynthesis, most of it by algae in the sea and by forests on land. O3 is ozone, a poisonous gas, which in a high atmospheric layer blocks otherwise deadly UV rays from the Sun.
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Source http://images-of-elements.com/oxygen.php
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Chemical Elements

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This file is available from Chemical Elements - A Virtual Museum (Jumk.de Webprojects). (images-of-elements.com). Materials from this website available via Creative Commons Attribution 3.0 Unported License.
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w:en:Creative Commons
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This file is licensed under the Creative Commons Attribution 3.0 Unported license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.

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current11:09, 15 September 2013Thumbnail for version as of 11:09, 15 September 20131,404 × 1,404 (203 KB)Stas1995 (talk | contribs)User created page with UploadWizard

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