TeZ =  52

From the Latin "Tellus", meaning "Earth"
(AM) Atomic Mass 127.6  amu    Oxidation States +2, +4, +6, -2
   (BP) Boiling Point 989.8  °C    (MP) Melting Point 449.5  °C
   (ρ) Density 6.24  g/cm3    Crystal Structure Hexagonal
   ( χ ) Electronegativity 2.1    (AR) Atomic Radius 1.35  Å
   Physical State Solid (C) Heat Capacity 0.202  J/g °C
Electronic-Config [Kr]  4d10  5s2  5p4     (I1) First Ionization E 869.23  kJ/mol
   (ΔHvap) Heat of Vaporization 114.1  kJ/mol     (ΔHfus) Heat of Fusion 17.49  kJ/mol
   Year of Discovery 1782    Location of Discovery Romania
(E°) Standard Potential Te ⇔ Te2- (-1.143 V)
Stable isotopes  120Te,  122Te,  124Te,  125Te,  126Te
Discovered/Synthesized by Franz Joseph Müller von Reichenstein
Natural Source Isolated by the recoverey in processing copper ores
Common Uses Alloys, semiconductors, photocopiers, computer disk, thermo-electric coolers and generators
Other Info Only element that easily forms minerals with gold
Te-128 has the longest half-life of any unstable isotope
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