Tellurium
Metalloid
Tellurium (Te) is a chemical element with atomic number 52, classified as a metalloid. At room temperature it is a solid. It was discovered in 1782 by Franz-Joseph Müller von Reichenstein.
Properties
- Atomic number
- 52
- Atomic mass
- 127.6 u
- Category
- Metalloid
- Group
- 16
- Period
- 5
- Block
- p-block
- Electron configuration
- [Kr] 4d¹⁰ 5s² 5p⁴
- Phase at STP
- Solid
- Density
- 6.232 g/cm³
- Melting point
- 722.66 K (449.5 °C)
- Boiling point
- 1261 K (987.9 °C)
- Electronegativity
- 2.1
- Atomic radius
- 123 pm
- Ionization energy
- 9.01 eV
- Discovery
- 1782 · Franz-Joseph Müller von Reichenstein
Common uses
Solar panels, thermoelectrics, catalysts, alloys
Did you know?
Rarer than gold and essential for high-efficiency solar panels.