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Tellurium Element Properties, Non-Metal, Chalcogen Group, Periodic Table of the Elements

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Tellurium

Tellurium Element Properties

p51
Sb
Antimony
p52
Te
Tellurium
p53
I
Iodine
General
NameTellurium
SymbolTe
Number52
Group Number16
GroupNon-Metal, Chalcogen
Blockp
Density6.24 g/cm3
Atomic Weight127.60 g/mol
Atomic Volume20.5 cm3/mol
Discover1783


States
StateSolid
Melting Point722.66 K
Boiling Point1261 K
Triple PointNil
Critical PointNil
Heat of Fusion17.49 kJ/mol
Heat of Vaporization114.1 kJ/mol


Energies
First Ionization Energy869.2 kJ/mole
Second Ionization Energy1794.6 kJ/mole
Third Ionization Energy2697.7 kJ/mole
Electronegativity2.1
Electron Affinity190.16 kJ/mole
Specific Heat0.20 J/gK
Heat Atomization197 kJ/mole atoms


Oxidation and Electrons
Shells2,8,18,18,6
Electron Configuration[Kr] 4d10 5s2 5p4
Minimum Oxidation Number-2
Maximum Oxidation Number6
Minimum Common Oxidation Number0
Maximum Common Oxidation Number6


Appearance and Characteristics
Crystal Structurehexagonal
Characteristicssemimetal
Colorsilvery
Usessemiconductors, steel
Hardness2.3 mohs
ToxicityYes


Reactions
Reaction with Airmild, w/ht, =>TeO2
Reaction with 6M HClNone
Reaction with 15M HNO3mild, =>Te(IV)
Reaction with 6M NaOHNone


Other Forms
Number of Isotopes8
HydrideH2Te
OxideTeO2 TeO3
ChlorideTe2Cl Te3Cl2 Te4Cl16


Radius
Atomic Radius142 pm
Ionic Radius (1+ ion)Nil
Ionic Radius (1- ion)Nil
Ionic Radius (2+ ion)Nil
Ionic Radius (2- ion)207 pm
Ionic Radius (3+ ion)Nil


Conductivity
Thermal Conductivity11.54 J/m-sec-deg
Electrical Conductivity0 1/mohm-cm
Polarizability5.5 A3


Abundance
SourceZn/Pb smelting by-product
Relation Abundance Solar System0.682 log
Abundance Earth's Crust-3 log


p51
Sb
Antimony
p52
Te
Tellurium
p53
I
Iodine




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