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Rhenium Element Properties, Transition metals Group, Periodic Table of the Elements

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Rhenium

Rhenium Element Properties

d74
W
Tungsten
d75
Re
Rhenium
d76
Os
Osmium
General
NameRhenium
SymbolRe
Number75
Group Number7
GroupTransition metals
Blockd
Density21.0 g/cm3
Atomic Weight186.207 g/mol
Atomic Volume8.85 cm3/mol
Discover1925


States
StateSolid
Melting Point3459 K
Boiling Point5869 K
Triple PointNil
Critical PointNil
Heat of Fusion60.43 kJ/mol
Heat of Vaporization704 kJ/mol


Energies
First Ionization Energy760 kJ/mole
Second Ionization EnergyNil
Third Ionization EnergyNil
Electronegativity1.9
Electron Affinity14 kJ/mole
Specific Heat0.13 J/gK
Heat Atomization770 kJ/mole atoms


Oxidation and Electrons
Shells2,8,18,32,13,2
Electron Configuration[Xe] 4f14 5d5 6s2
Minimum Oxidation Number-3
Maximum Oxidation Number7
Minimum Common Oxidation Number0
Maximum Common Oxidation Number4


Appearance and Characteristics
Crystal Structurehexagonal
Characteristicshigh melting point
Colorsilvery-white
Usescatalysts, thermocouples
HardnessNil
ToxicityNone


Reactions
Reaction with Airmild, w/ht =>Re2O7
Reaction with 6M HClNone
Reaction with 15M HNO3mild, =>HReO4
Reaction with 6M NaOHNone


Other Forms
Number of Isotopes2
HydrideNone
OxideRe2O5 ReO3 Re2O7
ChlorideRe3Cl9 ReCl4 ReCl5 ReCl6


Radius
Atomic Radius137 pm
Ionic Radius (1+ ion)Nil
Ionic Radius (1- ion)Nil
Ionic Radius (2+ ion)Nil
Ionic Radius (2- ion)Nil
Ionic Radius (3+ ion)Nil


Conductivity
Thermal Conductivity48 J/m-sec-deg
Electrical Conductivity51.813 1/mohm-cm
Polarizability9.7 A3


Abundance
SourceMolybdenite (sulfide)
Relation Abundance Solar System-1.287 log
Abundance Earth's Crust-2.3 log


d74
W
Tungsten
d75
Re
Rhenium
d76
Os
Osmium




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