1. TELLURIUM o Chemical symbol: Te o Atomic number: 52 o Color: silver-gray o Density: 6.240 g/cm³ o Melting point: 449.51˚c o Boiling point: 988˚c 1

2. Tellurium Tellurium was discovered in Romania in 1783 by Franz Muller von Reichenstein The word Tellurium comes from the Greek word tellus which means Earth 2

3. Tellurium o Used as a semiconductor o Used to color glass and ceramics o Used as an alloying agent o Small amounts added to copper and stainless steel o Added to lead to increase strength and resistance to sulfuric acid 3

4. Tellurium Tellurium has a shiny silver-gray color Tellurium is very brittle and can be smashed into a powder 4

5. Tellurium Facts o The element is toxic to handle o There are thirty know isotopes of tellurium o It has 52 protons and electrons o Tellurium has 76 neutrons o It burns in air or oxygen o It is unaffected by water o Tellurium is found in Australia, USA, and Romania 5

6. Bibliography Dingle, Adrian. The Periodic Table. Boston: King Fisher, 2007 Emsley, John. The Elements. Oxford, New York: Oxford University Press, 1989 6