Tellurium

Atomic symbol: Te
Atomic number: 52
Atomic mass: 127.60

Appearance: Silvery-gray crystalline solid or brown-black powder at 25°C

Group: 16
Period: 5
Series: Metalloids
Block: p
Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s²

Brittle, superconducting, and mildly toxic.

Commonly used in copper and steel alloys.

Fun Fact! While tellurium is very rare on Earth, discovered in ancient starlight, it is far more abundant in space.