Terbium

Atomic symbol: Tb
Atomic number: 65
Atomic mass: 158.93

Appearance: Silvery-white solid at 25°C

Group: N/a Period: 6
Series: Lanthanides
Block: f
Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 4f⁹ 6s²

Soft, ductile and malleable.

Many technological applications and uses, such as fiber optics, mobile phone and tablet screens and lighting, and energy-efficient light bulbs.

Fun Fact! Under ultraviolet light, terbium salts glow fluorescent green.