Tellurium (Te) - Element 52 | Properties & Electron Configuration
What is Tellurium?
Tellurium (Te) is element 52, a metalloid in period 5, group 16. Its electron configuration is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁴.
| Atomic Number | 52 |
| Symbol | Te |
| Atomic Mass | 127.6 u |
| Category | Metalloid |
| Period | 5 |
| Group | 16 |
| Block | p |
| Electron Configuration | 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁴ |
| Short Config | [Kr] 4d¹⁰ 5s² 5p⁴ |
| Electronegativity | 2.1 |
| Atomic Radius | 137 pm |
| Ionization Energy | 869 kJ/mol |
| Electron Affinity | 190 kJ/mol |
| Phase (STP) | Solid |
Electron Configuration
The full electron configuration of Tellurium is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁴. In noble gas shorthand, this is written as [Kr] 4d¹⁰ 5s² 5p⁴.
Tellurium is a p-block element in group 16, period 5.
Periodic Trends
Electronegativity: Tellurium has a Pauling electronegativity of 2.1. Within group 16, electronegativity generally decreases down the group.
Atomic Radius: 137 pm. Across period 5, atomic radius generally decreases left to right as nuclear charge increases.
Ionization Energy: 869 kJ/mol. Ionization energy generally increases across a period and decreases down a group.
View all 118 elements with trend overlays for electronegativity, atomic radius, ionization energy, and electron affinity.
Explore Tellurium on the Interactive Periodic TableRelated Topics
Oxygen (O)
Properties of Oxygen - same group as Tellurium
Sulfur (S)
Properties of Sulfur - same group as Tellurium
Selenium (Se)
Properties of Selenium - same group as Tellurium
Rubidium (Rb)
Properties of Rubidium - same period as Tellurium
Strontium (Sr)
Properties of Strontium - same period as Tellurium
Yttrium (Y)
Properties of Yttrium - same period as Tellurium