Element 52

Tellurium (Te)

52

Te

tellurium

Metalloid · p block · group 16, period 5

Electron configuration: $[\mathrm{Kr}]\,5s^{2}\,4d^{10}\,5p^{4}$
Unpaired electrons: 2 (paramagnetic)
Valence electrons: 6
Molar mass: 127.6 g/mol
Electronegativity: 2.1
Atomic radius: 142 pm
First ionization energy: 869 kJ/mol
Next ionization energies: 1,790
Electron affinity: 190 kJ/mol released

Course molecules with tellurium

$\ce{TeCl4}$ tellurium tetrachloride

Practice

Practice tellurium

Questions from the course about tellurium. If you’re signed in, your answers count toward your progress.

Question 1Compare two elements and explainExam level
Which gaseous atom releases more energy when it gains an electron (has the more exothermic electron affinity), $\ce{Te}$ or $\ce{Rb}$ , and why?

Where it comes up in the course