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File:Tungsten rod with oxidized surface, 80 grams. Original size in cm - 1.3 x 3.jpg

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English: Tungsten is a very hard, brittle, silvery heavy metal with a very high melting point. Its most famous application therefore is as filament in light bulbs, which is declining because of their bad energy efficiency. More often used than pure tungsten is tungsten carbide, WC, which is a very hard and mechanically enduring ceramic material. This is used for drills, milling machines and even for jewellery. Tungsten carbide is much cheaper than the related carbides of hafnium and tantalum. Some bacteria use tungsten in enzymes, which makes it the element with the highest number that has a biological role.
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Source http://images-of-elements.com/tungsten.php
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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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