Atomic number 52
Tellurium
Metalloid
Quick facts
- Atomic mass
- 127.60
- Group
- 16
- Period
- 5
- State (STP)
- solid
- Electronegativity
- 2.10
- Common ox. states
- -2, +4, +6
Properties
Electron configuration
[Kr] 4d¹⁰ 5s² 5p⁴
- Ionization energy
- 869.3 kJ/mol
- Electron affinity
- 190.2 kJ/mol
- Melting point
- 722.66 K (449.5 °C)
- Boiling point
- 1261.00 K (987.9 °C)
How it bonds
Tellurium below selenium and sulfur: 2 bonds + 2 lone pairs in H₂Te (which smells revolting), expanded-octet +4 and +6 states. Phase-change memory (PCM) chips use Ge-Sb-Te alloys.