Tungsten

By: Jewlz

Tungsten

Atomic Symbol is W Atomic Number is 74 Atomic Weight is 183.84(1) Periodic Table Group is 6 The color is greyish white, lustrous Classification Metalic

Pictures of Tungsten 113

2D Picture of Tungsten

•Physical Properties !!

1. Melting Point- 3695[or 3422 degrees (Celsius( 6192 degree F)]K

2. Boiling Point-5828[or 5555 degrees Celsius( 10031 degrees F)]K

3. Density of solid- 19250 kg m-3

Chemical Properties

1. Ground state electron configuration:  [Xe].4f14.5d4.6s2

2. Electrons per shell 2,8,18,32,12,2

3. 5d46s2

4. +4,+6 (mildly acidic oxide)

Uses of Tungsten1. useful for glass-to-metal seals since the thermal expansion is about the

same as borosilicate glass2. tungsten and its alloys are used extensively for filaments for electric lamps,

electron and television tubes, and for metal evaporation work3. electrical contact points for car distributors4. X-ray targets5. windings and heating elements for electrical furnaces6. missile and high-temperature applications7. high-speed tool steels and many other alloys contain tungsten8. the carbide is important to the metal-working, mining, and petroleum

industries9. calcium and magnesium tungstates are widely used in fluorescent lighting10. tungsten salts are used in the chemical and tanning industries11. tungsten disulphide is a dry, high-temperature lubricant, stable to 500°C12. tungsten bronzes and other tungsten compounds are used in paints13. TV tubes (electron tubes)14. X-ray targets

History of Tungsten

1. Tungsten used to be known as wolfram (from wolframite, said to be named from wolf rahm or spumi lupi, because the ore interfered with the smelting of tin and was supposed to devour the tin). The de Elhuyar brothers found an acid in wolframite in 1783 that they succeeded in reducing to the elemental metal with charcoal.

Allotropes, Isotopes and Important Compounds

Allotropes:4 A- Tungsten (A W), B Tungsten(B W), Y-Tungsten(Y W), Amorphous Tungsten

Isotopes: W184

Other Important Information: found in Spain. It means heavy stone, gets it’s symbol from German name Wolfram

Other Interesting Facts date of discovery

1783 Discoverer

Don Fausto de Elhuyar

Birth

October 11, 1755

Death January 6, 1833

Discoverer Juan José de Elhuyar

Birth

June 15, 1754

Death

September 20, 1796

Location of Discovery

Vergara, Spain