• Name: Terbium

  • Symbol: Tb

  • Number of Energy Levels: 6

  • Electrons on the outer energy level: 2

  • Atomic Number: 65

  • Atomic Mass: 158.92534 Amu

  • Protons / Electrons: 65

  • Neutrons: 94

  • Density: 8.27 g/cm3

  • Classification: Rare Earth

Top 10 interesting facts about Terbium

  • Terbium was discovered in 1843 by Carl Mosander. Its name derives from word "Ytterby" which is the name of a town in Sweden.
  • Terbium's melting point is at 1360.0 C (1633.15 K, 2480.0 F) and its boiling point is at 3041.0 C (3314.15 K, 5505.8 F).
  • Terbium is silvery-white rare-earth metal.
  • Terbium is malleable and ductile.
  • Terbium is part of many minerals. It is never found free in nature.
  • Only one stable isotope of terbium is known, terbium-159.
  • Terbium also has 36 radioisotopes and 27 nuclear isomers.
  • Almost all of terbium's production is used in green phosphors for fluorescent lamps in trichromatic lightning technology (together with europium blue phosphorus and europium red phosphorus) and color TV tubes.
  • Terbium is used in calcium fluoride and calcium tungstate in solid-state devices, as a stabilizer of fuel cells, in alloys and electronic devices, in naval sonar, in sensors, etc.
  • Terbium has no known biological role and it is considered of low toxicity.