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74 W Tungsten

Transition metal, mass: 183.84 u, 4 stable isotopes (182, 183, 184, 186), abundance rank (earth/space): 26/72

Click image to magnify. Cuboid made of sintered tungsten, 120 grams. Original size in cm: 1.6 x 3.8
Tungsten Sintered tungsten
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 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.

Tungsten filament
Tungsten filament from a light bulb.


Creative Commons License The images are licensed under a Creative Commons Attribution 3.0 Unported License, unless otherwise noted. Attribution by linking to the according element page.


Page last changed on January 14. 2010

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