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Tellurium (Te)
Atomic number 52 · Metalloid
| Atomic number | 52 |
|---|---|
| Atomic mass | 127.6 u |
| Molar mass | 127.6 g/mol |
| Category | Metalloid |
| Group / period / block | 16 / 5 / p |
| Electron configuration | [Kr] 4d10 5s2 5p4 |
| Electrons per shell | 2, 8, 18, 18, 6 |
| Electronegativity (Pauling) | 2.1 |
| Atomic radius | 140.0 pm |
| Density | 6.232 g/cm³ |
| First ionisation energy | 9.0098 eV |
| Melting point | 722.66 K (449.51 °C) |
| Boiling point | 1261.15 K (988.00 °C) |
| Common oxidation states | -2, +2, +4, +6 |
| Abundance in Earth's crust | 0.001 ppm |
Uses
Solar panels, rewritable discs
Discovery
1782, Franz Müller von Reichenstein