Tungsten

 


 

Name Tungsten
Symbol W
Atomic Number 74
Atomic Mass 183.84 atomic mass units
Number of Protons 74
Number of Neutrons 110
Number of Electrons 74
Melting Point 3410.0 C
Boiling Point 5660.0 C
Density 19.3 grams per centimeter
Normal Phase Solid
Family Transition Metals
Period 6
Cost $50 per pound

 


 

Origin of Name From the Swedish words tung sten, meaning heavy stone.
The symbol comes from the German word wolfram.
Date and Place of Discovery Discovered in 1781; isolated in 1783
Discovered by Discovered by Carl Wilhelm Scheele
Isolated by Fausto and Juan Jose de Elhuyar
Common Compounds
Interesting facts
  • It has the highest melting point of all the non-alloyed metals and the second highest of the elements after carbon.
  • It can be cut with a hacksaw in its pure state.
  • It is very resistant to corrosion and is only attacked slight by most mineral acids.
  • It greatly increases the toughness of steel when alloyed with it.
Common Uses
  • Metalworking
  • Mining
  • Petroleum
  • Construction industry
  • Light bulbs (wire filaments)
  • Vacuum tubes
  • Electrodes
  • Thin wires
  • Heavy metal alloys
  • Heat sinks
  • Darts
  • Ammunition
  • Turbine blades
  • Radiation shields
  • Catalysts
  • Lubricants
  • Glass to metal seals
  • Integrated circuits
  • Radiopharmaceuticals
  • Nuclear medicines
  • X-ray targets
  • Electron microscopes
  • Electrical contacts
  • Ceramic glazes
  • Strings for musical instruments
  • Electrical furnaces
  • Drill bits

 

Photo Courtesy of About.com
Chemical Elements
Mrs. Purdy's Web Page
Wikipedia




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