Tungsten

 =Tungsten=


 * Atomic Number:** 74


 * Protons:** 74


 * Electrons:** 74


 * Neutrons:** 110


 * Average Atomic Mass:** 183.84


 * Isotopes:** W-178, W-179, W-180, W-181, W-182, W-183, W-184, W-185, W-186, W-187, W-188.


 * Discovery:** Fausto and Juan Jose de Elhuyar discovered Tungsten in 1783.


 * Name:** Origin of name came from the Swedish words "tung sten" meaning "heavy stone"(the origin of the symbol W is "wolfram ", named after the tungsten mineral wolframite).


 * Uses:** Useful for glass-to-metal seals since the thermal expansion is about the same as borosilicate glass. It is also useful for X-ray targets, electric lamps, television tubes, and lots of others.


 * Interesting Facts**: Tungsten looks like a steel-gray to tin-white metal. It has the highest tensile strength at temperatures over 1650 degrees C. Tungsten also has the highest melting point and lowest vapour pressure of all metals. It has to be protected at elevated temperatures because it oxidises in the air. Tungsten is attacked only slightly by most mineral acids because of its excellent corrosion resistance.

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 * Video:**


 * Sources**
 * Photo:[|Creative Commons Search on flickr by videocrab]
 * [|Tungsten on WebElements]
 * [|History of Tungsten on WebElements]
 * [|Tungsten Uses on WebElements]
 * [|Tungsten Isotopes on WebElements]
 *  __Video:[|Tungsten from the Periodic Table of Videos on Youtube]__