65

Tb

Terbium
158.92535 (2)
 Historical Information

Terbium was discovered by Gustav Mosander in 1843. He detected it is as an impurity in yttria which is yttrium oxide, Y2O3.
Basic Information Shells
  • Name:Terbium
  • Symbol: Tb
  • Atomic number: 65
  • Atomic weight:158.92535 (2)
  • Standard state: solid at 298 K
  • Group in periodic table:
  • Group name:Lanthanoid
  • Period in periodic table: 6
  • Block in periodic table: f-block
  • Classification: Metallic
 Terbium
Uses Trivia
  • the oxide has potential as an activator for green phosphors used in colour TV tubes
  • used to dope calcium fluoride, calcium tungstate, and strontium molybdate, used in solid-state devices

Terbium is reasonably stable in air. It is a silvery-grey metal, and is malleable, ductile, and soft enough to be cut with a knife. It is a rare earth metal found in cerite, gadolinite and monazite.