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General information about Tungsten |
| Tungsten |
| W |
| 74 |
| Transition Metals |
| 6 |
| 6 |
| d |
| grayish white, lustrous |
| 183.84 g·mol-1 |
1s2 2s2p6 3s2p6d10
4s2p6d10f14 5s2p6d4 6s2 |
| 2, 8, 18, 32, 12, 2 |
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Physical properties of Tungsten |
| solid |
| 19.25 g·cm-3 |
| 3695(K),
3422°C, 6193 °F |
| 5828(K),
5555°C, 10031 °F |
| ? |
| ? |
| 52.31 kJ·mol-1 |
| 806.7 kJ·mol-1 |
| 24.27 J·mol-1·K-1 |
| 2.36 (Pauling scale) |
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Atomic structure of Tungsten |
| 2.02 Å |
| 9.53 cm³/mol |
| 1.3 Å |
| 18.3 |
| Cubic body centered |
| 62 (+6e) 70 (+4e) |
| 5d4 |
| 74 |
| 110 |
| 74 |
| 6, 5, 4, 3, 2 |
| 5d4 6s2 |
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Electron dot
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Other languages |
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| Latin: |
Wolframium |
| Czech: |
Wolfram |
| Croatian: |
Volfram |
| French: |
Tungsténe |
| German: |
Wolfram - r |
| Italian: |
Wolframio |
| Norwegian: |
Wolfram |
| Portuguese: |
Tungstênio |
| Spanish: |
Wolframio |
| Swedish: |
Volfram |
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| Element |
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74 |
2
8
18
32
12
2
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W |
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183.84 |
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Brief description |
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Tungsten has a melting point of 3410+/-20°C, boiling point of 5660°C, specific gravity of 19.3 (20°C), with a valence of 2, 3, 4, 5, or 6. Tungsten is a steel-gray to tin-white metal. Impure tungsten metal is quite brittle, although pure tungsten can be cut with a saw, spun, drawn, forged, and extruded. Tungsten has the highest melting point and the lowest vapor pressure of the metals. At temperatures exceeding 1650°C, it has the highest tensile strength. Tungsten oxidizes in air at elevated temperatures, although it generally has excellent corrosion resistance and is minimally attacked by most acids.
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Uses of Tungsten |
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Used widely in the electronics industry. Made into filaments for vacuum tubes and electric lights. Also used in contact points in cars, welding electrodes, rocket nozzles and cutting tools. Combined with calcium or magnesium it makes phosphors.
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Hystory of Tungsten |
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- Discoverer: Fausto and Juan José de Elhuijar
- Discovery Location: Spain
- Discovery Year: 1783
- Name Origin: Swedish: tung sten - heavy stone. W symbol - German name Wolfram, which was named after Wolframite.
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