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Name: Terbium
Symbol: Tb
Number of Energy Levels: 6
Electrons on the outer energy level: 2
Atomic number: 65
Atomic Mass: 158.92534 Amu (Atomic Mass Units)
Protons/Electrons: 65
Neutrons: 94
Density: 8.27 g/cm3
Classification: Rare Earth

Terbium | Chemical elements

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).

Top 8 interesting facts about Terbium

  1. Terbium is silvery-white rare-earth metal.
  2. Terbium is malleable and ductile.
  3. Terbium is part of many minerals. It is never found free in nature.
  4. Only one stable isotope of terbium is known, terbium-159.
  5. Terbium also has 36 radioisotopes and 27 nuclear isomers.
  6. 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.
  7. Terbium is used 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.
  8. Terbium has no known biological role and it is considered of low toxicity.

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