Basic Information

Name: Tellurium 
Symbol: Te 
Atomic Number: 52 
Atomic Mass: 127.6 amu 
Melting Point: 449.5 °C (722.65 K, 841.1 °F) 
Boiling Point: 989.8 °C (1262.95 K, 1813.64 °F) 
Number of Protons/Electrons: 52 
Number of Neutrons: 76 
Classification: Metalloid 
Crystal Structure: Hexagonal 
Density @ 293 K: 6.24 g/cm3 
Color: silverish
Date of Discovery: 1782 
Discoverer: Franz Muller von Reichenstein 
Name Origin: From the Greek word tellus (Earth) 
Uses: coloring of glass and ceramics, thermoelectric devices 
Obtained From: by-product of refining of lead and copper