Name: Terbium

Atomic Symbol and Mass Number: Tb [65]

Electron Configuration: [Xe] 4f  s 

Atomic Radii: 177 pm

Electron Affinity: 50 kJ mol‑1

Oxidation States: 4, 3, 2, 1

Electronegativity Value: 1.2

Elemental Group: Lanthanide

Uses and Properties:

• Terbium is a soft, malleable, ductile, silver-gray metal member of the lanthanide group of the periodic table.

• It is reasonably stable in air, but it is slowly oxidised and it reacts with cold water.

• Terbium is used to dupe calcium fluoride, calcium tungstate and strontium molybdate, all used in solid-state devices.

• It is also used in low-energy lightbulbs and mercury lamps.

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Lewis Diagram: