Relative atomic mass: 183.84 +- 0.01

English: Tungsten
French: Tungstene
Croatian: Volfram
German: Wolfram
Italian: Wolframio
Spanish: Wolframio

Atomic number: 74
Group numbers: 6
Period: 6
Standard state (20 oC): solid

Discovery: 1783 Fausto Elhuyar, Juan Jose de Elhuyar (ES)
Tungsten was discovered by Fausto and Juan Jose de Elhuyar (ES) in 1783. Named after the tungsten mineral wolframite. It is a hard, steel-grey to white metal that has the highest melting point of all metals. Tungesten resists oxygen, acids and alkalis. Tungsten occurs in the minerals scheelite (CaWO4) and wolframite [(Fe,Mn)WO4]. It is made into filaments for vacuum tubes and electric lights it can also be used as contact points in cars. Tungsten carbide is extremely hard and is used for making cutting tools and abrasives. Tungsten carbide is also employed for use in many military applications such as creating armor-piercing munitions as well as in the creation of nuclear weaponry. The price of 99.95 % pure tungsten powder is 193.60 for 250 g.
Electronic configuration: [Xe] 4f14 5d4 6s2
Formal oxidation number: +6
Atomic radius: 137 pm

Electronegativities: 1.7
Thermal conductivity: 174 W/(m K)
Electrical resistivity (20 oC): 5.4 microOhm cm

Melting point: 3422 oC
Boiling point: 5555 oC

Heat of fusion: 35.2 kJ/mol
Heat of vaporization: 824.2 kJ/mol
Heat of atomization: 848.1 kJ/mol

73Ta <= 74W => 75Re

ASCII Periodic Table of the Elements
29 Aug. 2017
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