Tellurium (Te)

Tellurium is a chemical element with symbol Te and atomic number 52. It is a brittle, mildly toxic, rare, silver-white metalloid.

Atomic Number

52

Atomic Mass

127.6 u

Category

metalloid

Phase

solid

Density

6.24 g/cm³

Electron Shells

2, 8, 18, 18, 6

Atomic Structure

Protons: 52 • Electrons: 52 • Neutrons: Varies by isotope

Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁴

Discovery

1782 • Franz-Joseph Müller von Reichenstein