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Astronomy Chemical element

Terbium

Terbium (Tb) is a chemical element belonging to the category Inner transition metal, with atomic number 65 and atomic mass 158.9250 u. This sheet describes its fundamental properties, periodic position and physical characteristics.

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Astronomy · Chemical element

Terbium

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Identity

  • Name: Terbium
  • Symbol: Tb
  • Atomic number: 65
  • Atomic mass: 158.9250 u

Position in the periodic table

  • Group: 3
  • Period: 6
  • Category: Inner transition metal

Physico-chemical properties

  • Standard state: Solid
  • Melting point: Very high (800°C to 3500°C)
  • Density: High
  • Electron configuration: [Xe] 4f⁹ 6s²

Scientific description

Terbium is a chemical element with symbol Tb and atomic number 65. It belongs to the category of Inner transition metal and occupies group 3 and period 6. Its standard atomic mass is 158.9250 u.