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Indium Element Properties, Metal Group, Periodic Table of the Elements

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Indium

Indium Element Properties

d48
Cd
Cadmium
p49
In
Indium
p50
Sn
Tin
General
NameIndium
SymbolIn
Number49
Group Number13
GroupMetal
Blockp
Density7.31 g/cm3
Atomic Weight114.82 g/mol
Atomic Volume15.7 cm3/mol
Discover1863


States
StateSolid
Melting Point429.75 K
Boiling Point2345 K
Triple PointNil
Critical PointNil
Heat of Fusion3.281 kJ/mol
Heat of Vaporization231.8 kJ/mol


Energies
First Ionization Energy558.3 kJ/mole
Second Ionization Energy1820.6 kJ/mole
Third Ionization Energy2704.5 kJ/mole
Electronegativity1.78
Electron Affinity30 kJ/mole
Specific Heat0.23 J/gK
Heat Atomization243 kJ/mole atoms


Oxidation and Electrons
Shells2,8,18,18,3
Electron Configuration[Kr] 4d10 5s2 5p1
Minimum Oxidation Number0
Maximum Oxidation Number3
Minimum Common Oxidation Number0
Maximum Common Oxidation Number3


Appearance and Characteristics
Crystal Structuretetragonal
Characteristicssoft
Colorsilvery-white
Usestransistors, photocells
Hardness1.2 mohs
ToxicityNone


Reactions
Reaction with Airmild, =>In2O3
Reaction with 6M HClmild, =>H2, InCl3
Reaction with 15M HNO3mild, =>In(NO3)3
Reaction with 6M NaOHNone


Other Forms
Number of Isotopes2
HydrideNone
OxideIn2O3
ChlorideInCl InCl3


Radius
Atomic Radius167 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)94 pm


Conductivity
Thermal Conductivity81.8 J/m-sec-deg
Electrical Conductivity119.474 1/mohm-cm
Polarizability9.7 A3


Abundance
SourceZn/Pb smelting by-product
Relation Abundance Solar System-0.735 log
Abundance Earth's Crust-1 log


d48
Cd
Cadmium
p49
In
Indium
p50
Sn
Tin




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