Tellurium is a semi-metallic element on the periodic table. The name "tellurium" is derived from a Latin term for earth, "tellus." Tellurium is in group 16, period 5 on the periodic table of elements. It is a Halogen. It was discovered in 1783 in gold ores in Trannsylvania, Romania. The chief inspector of mines Franz Joseph Muller von Reichenstein discovered it, but M. Klaproth isolated it in 1798 and named it, continuing Muller von Reichenstein's work.
The symbol for Tellurium is Te. It is atomic number 52 and has an average atomic mass of 127.60(3) g. Its density is 6.24 g/cm3 at 293K. Tellurium's electro negativity is 2.1. Its 1st ionization energy is 869.2 kJ/mole. Its 2nd is 1794.6 kJ.mole. The 3rd is 2697.7 kJ/mole. The melting poi
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