Tellurium |
| Symbol | Te |
|---|---|
| Latin name | Tellurium |
| Atomic number | 52 |
| Period | 5 |
| Element category | Metalloids |
| Relative atomic mass | 127.60 |
| Group | VI.A |
| Electronegativity | 2.1 |
| Oxidation numbers | -2, 2, 4, 6 |
| Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p4 |
| Density [g/cm3] | 6.25 |
| State | Solid |
| Melting point [°C] | 449.5 |
| Boiling point [°C] | 1100 |
| Atomic radius [pm] | 123 |
| Covalent radius [pm] | 135 |
| Thermal conductivity [W m-1K-1] | 2.35 |
| Heat capacity [J K-1g-1] | 0.202 |
| Discovery | 1782 |
| Hardness [Mohs scale] | 2.3 |
| Brinell hardness [MPa] | 180 |
| Young's modulus [GPa] | 43 |
| Electrical conductivity [S m-1] | 1 · 104 |
| Shear modulus [GPa] | 16 |
| 1.st ionization energy [eV] | 9.0096 |
| 2.nd ionization energy [eV] | 18.6 |
| 3.rd ionization energy [eV] | 27.96 |
| Stable isotopes | 8 |
| Unstable isotopes | 22 |