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W ( Tungsten )

Keterangan

     Some sources give the German chemist Karl Wilhelm Scheele as the first to isolate the metal in 1880, but most sources credit the Elhuijar brothers.

Nama lain (trademark, branding etc.)

Wolframium, Wolfram, Tungsténe, Wolfram - r, Wolframio, Tungstênio, Вольфрам, Volfram

 

Spesifikasi Produk

Overview of Tungsten
Atomic Number 74
Group 6
Period 6
Series Transition Metals
Relative Atomic Mass (12C=12.000)  183.85
Boiling Point 5928K 5655°C 10211°F
Melting Point  3680K 3407°C 6165°F
Density/kg m-3  19300 (293K)
Ground State Electron Configuration  [Xe]4f145d46s2
Electron Affinity(M-M-)/kJ mol-1  -119
Discoverer Fausto and Juan José de Elhuijar
Discovery Location Vergara Spain
Discovery Year 1783
Name Origin Swedish: tung sten (heavy stone): W symbol from its German name wolfram which is named after wolframite.

Aplikasi

     Tungsten and its alloys are used extensively for filaments for electric lamps, electron tubes and television tubes. As it has the highest melting point of all metals it is used in numerous high-temperature applications. High-speed tool steels contain tungsten, as does a new "painless" dental drill which spins at ultra-high speeds.
     Tungsten carbide is immensely hard and so is of great importance to the metal-working, mining and petroleum industries.
     Calcium and magnesium tungstates are widely used in fluorescent lighting.

Bahan Baku

Tungsten, also known as wolfram, is a chemical element with the chemical symbol W and atomic number 74.

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