Difference between revisions of "Tungsten"
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[[Category:Elements]] | [[Category:Elements]] | ||
[[Category:Metals]] | [[Category:Metals]] | ||
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+ | '''Tungsten''' is a very dense, grayish-silver metal. Its [[density]] is virtually the same (to three decimal places) as [[gold]]. It also has the highest [[melting point]] of all metals, and at temperatures over 1650 °C, the highest tensile strength. The metal oxidizes in air and needs to be protected at higher temperatures. It has very good corrosion resistance and is corroded only slightly by most mineral [[acid]]s. Tungsten is exploited for its high [[melting point]] and [[density]], and that is reflected in its uses. | ||
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+ | == Uses == | ||
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+ | Tungsten has a variety of uses from ballast weights for aircraft control panels, to filaments in light bulbs: | ||
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+ | - Electrodes for welding | ||
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+ | - Wire extrusion dies | ||
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+ | - X-ray tube windows | ||
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+ | - Armor piercing projectiles | ||
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+ | - Shotgun shot | ||
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+ | - Bucking bars | ||
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+ | - Evaporation filaments and boats | ||
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+ | {{Periodic table}} |
Latest revision as of 20:51, July 13, 2016
Tungsten | |
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Properties | |
Atomic symbol | W |
Atomic number | 74 |
Classification | Transition Metal |
Atomic mass | 183.84 amu |
Other Information | |
Date of discovery | 1783 |
Name of discoverer | José and Fausto Elhuyar |
Name origin | From the Swedish tung sten meaning heavy stone. |
Uses | Due to its high melting point, tungsten is suitable for aerospace and high temperature uses which include drilling, electrical, heating, and welding applications. |
Obtained from | Tungsten is found in the minerals wolframite , scheelite, ferberite and hübnerite. The metal is commercially produced by reducing tungsten oxide with hydrogen or carbon.. |
Tungsten is a very dense, grayish-silver metal. Its density is virtually the same (to three decimal places) as gold. It also has the highest melting point of all metals, and at temperatures over 1650 °C, the highest tensile strength. The metal oxidizes in air and needs to be protected at higher temperatures. It has very good corrosion resistance and is corroded only slightly by most mineral acids. Tungsten is exploited for its high melting point and density, and that is reflected in its uses.
Uses
Tungsten has a variety of uses from ballast weights for aircraft control panels, to filaments in light bulbs:
- Electrodes for welding
- Wire extrusion dies
- X-ray tube windows
- Armor piercing projectiles
- Shotgun shot
- Bucking bars
- Evaporation filaments and boats
Periodic Table of the Elements | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | |||||||
74
W 183.85 |
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*Lanthanides | ||||||||||||||||||||||||
**Actinides | ||||||||||||||||||||||||