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 |