Element 52
Tellurium (Te)
Tellurium (Te) is element 52 of the periodic table, a metalloid in period 5, group 16 (p-block) with an atomic mass of 127.6 and is a solid at standard conditions.
At a glance
- Atomic number
- 52
- Symbol
- Te
- Atomic mass
- 127.6 u
- Category
- Metalloids
- Period
- 5
- Group
- 16
- Block
- p-block
- Phase at STP
- solid
Electron structure
- Electron configuration
- 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p4
- Shorthand configuration
- [Kr] 4d10 5s2 5p4
- Electrons per shell
- 2, 8, 18, 18, 6
- Oxidation states
- -2, -1, +1, +2, +3, +4, +5, +6
Physical properties
- Melting point
- 722.66 K
- Boiling point
- 1261 K
- Density
- 6.232 g/cm3
- Phase
- solid
Atomic properties
- Electronegativity (Pauling)
- 2.1
- Atomic radius
- 123 pm
- Covalent radius
- 138 pm
- Van der Waals radius
- 206 pm
- First ionization energy
- 869 kJ/mol
- Electron affinity
- 190 kJ/mol
Notable isotopes
| Isotope | Mass | Abundance | Stability |
|---|---|---|---|
| Te-130 | 129.90622 | 34.08% | Stable |
Common uses
- Solar cells
- Thermoelectric devices
- Metallurgy
- Rubber
Discovery
- Year
- 1783
- Discovered by
- Franz-Joseph Müller von Reichenstein
- Country
- Romania