Symbol Te Atomic radius: pm 143 Fusion: kJ/Mole 17.49
Name Tellurium Ionic radius: pm (-2)221 Boiling point: C 988
Atomic number 52 Electron affinity 1.97 Melting point: C 450
Atomic weight 127.6 1st  ion potential 9.01 Specific Heat Cap: J/(g K) 0.20
Classification Metalloid Natural form Solid Thermal Cond: W/(cm K) 0.03
Configuration Kr]4d105s2p4 Crystal structure Hex Electrical Cond 2x10-6
Oxidation states +/-2,4,6 Density 6.24 Abundance: mg/kg-crust 0.001
Electronegativity 2.10 Vaporization: kJ/Mole 114.1    
Tellurium was discovered in 1728 by Franz Muller von Reichenstein. Uses - semiconductors, steel, coloring of glass and ceramics, thermoelectric devices