78

Pt

Platinum
195.084 (9)
 Historical Information

The metal was used by pre-Columbian Indians but platinum was "rediscovered" in South America by Ulloa in 1735 and by Wood in 1741. In 1822 plenty of platinum was discovered in the Ural Mountains in Russia.
Basic Information Shells
  • Name:Platinum
  • Symbol: Pt
  • Atomic number: 78
  • Atomic weight: 195.084 (9)
  • Standard state: solid at 298 K
  • Group in periodic table: 10
  • Group name:Precious metal or Platinum group metal
  • Period in periodic table: 6
  • Block in periodic table: d-block
  • Classification: Metallic
 Iridium
Uses Trivia
  • jewellery
  • thermocouple elements
  • platinum-cobalt alloys have magnetic properties
  • dentistry

Platinum is a beautiful silvery-white metal, when pure, and is malleable and ductile. It has a coefficient of expansion almost equal to that of soda-lime-silica glass, and is therefore used to make sealed electrodes in glass systems.