38

Sr

Strontium
87.62 (1)
 Historical Information

Adair Crawford in 1790 recognized a new mineral (strontianite) in samples of witherite (a mineral consisting of barium carbonate, BaCO3) from Scotland. It was some time before it was recognised that strontianite contained a new element.

Basic Information Shells
  • Name:Strontium
  • Symbol: Sr
  • Atomic number: 38
  • Atomic weight:[ 223 ]
  • Standard state: a solid at 298 K
  • Group in periodic table: 2
  • Group name:Alkaline earth metal
  • Period in periodic table: 5
  • Block in periodic table: s-block
  • Classification: Metallic
 Strontium
Uses Trivia
  • fireworks (red flame), flares
  • refining zinc
  • optical materials

The result of adding different metal salts to a burning reaction mixture of potassium chlorate and sucrose. The red colour originates from strontium sulphate. The orange/yellow colour originates from sodium chloride.