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< Back Tellurium  SEE PERIODIC TABLE   SEE FULL ARTICLE Atomic Number 52 Atomic Symbol Te Atomic Weight 127.60 amu Group Metalloid, 16 Form Solid Density @ STP 6.24 g/cm3 Melting Point 449.51 °C (841.118 °F, 722.66 °K) Boiling Point 988 °C (1810.4 °F, 1261.15 °K) Heat of Fusion 17.49 kJ/mol Heat of Vaporization 114.1 kJ/mol First Ionization Potential 9.0096 eV Electronegativity (on Pauling scale) 2.1 Specific Heat Capacity 0.202 J/g K Ground State Electron Configuration 5p4 Oxidation States +4, +6, -2 Stable Isotopes and Natural Abundance on Earth 120Te, 0.096%; 122Te, 2.603%; 123Te, 0.908%; 124Te, 4.816%; 125Te, 7.139%; 126Te, 18.95%; 128Te, 31.69%; 130Te, 33.80% Atomic Radius 123 pm Crystal Structure Trigonal Discovered by Muller von Reichstein, 1783

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