Discovered By: Franz-Joseph Muller von Reichenstein
Discovery year: 1783

The following table showing some properties of tellurium(Te):

Table Example
Atomic number 52
Group 16
Period 5
Block p
Electrons 52
Protons 52
Neutrons 76
Atomic weight 127.6
Oxidation states -2, +2, +4, +6
Ionic charge Te^2-


Table Example
Electrons per shell K2 L8 M18 N18 06
Electrons configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^4
Atomic radius 123 pm
Covalent radius 138 pm
Van der Waals radius 206 pm
Boiling point 988°C
Melting point 449.51°C
Phase Solid
Fusion heat 17.5 kJ.mol^-1
Vaporization heat 48 kJ.mol^-1


Table Example
Color Silver
Brinell hardness 180 MPa
Bulk modulus 65 GPa
Density 6240 kg.m^-3
Liquid density 5700 kg.m^-3
Mohs hardness 2.25
Refractive index 1.000991
Shear modulus 16 GPa
Sound speed 2610 m.s^-1
Young's modulus 43 GPa


Table Example
Electrical type Semiconductor
Magnetic type Diamagnetic
Resistivity 1*10^-4 Ohm.m
Electronegativity 2.1
Valence 6
Electron affinity 190.2 kJ.mol^-1
Radioactive No
Neutron cross section 5.4 barn
First ionization energy 869.3 kJ.mol^-1
Electrical conductivity 1*10*4 S.m^-1