Chemicool
In
49
114.82
Indium
General
|
States
|
Energies
|
Oxidation & Electrons
|
Appearance & Characteristics
Reactions
|
Other Forms
|
Radius
|
Conductivity
|
Abundance
Encyclopedia Britannica articles
General
Name
Indium
Symbol
In
atomic number
49
Atomic weight
114.82
Density @ 293 K
7.31 g/cm3
Atomic volume
15.7 cm3/mol
Group
Metal
discovered
1863
States
state (s, l, g)
s
melting point
429.81 K
boiling point
2353 K
Heat of fusion
3.263 kJ/mol
Heat of vaporization
231.50 kJ/mol
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Energies
1st ionization energy
558.3 kJ/mole
electronegativity
1.78
2nd ionization energy
1820.6 kJ/mole
electron affinity
30 kJ/mole
3rd ionization energy
2704.5 kJ/mole
Specific heat
0.23 J/gK
heat atomization
243 kJ/mole atoms
Oxidation & Electrons
Shells
2,8,18,18,3
electron configuration
[Kr] 4d10 5s2 5p1
minimum oxidation number
0
maximum oxidation number
3
min. common oxidation no.
0
max. common oxidation no.
3
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Appearance & Characteristics
structure
distorted fcc structure
color
silvery-white
uses
transistors, photocells
toxicity
hardness
1.2 mohs
characteristics
soft
Reactions
reaction with air
mild, = In2O3
reaction with 6M HCl
mild, = H2, InCl3
reaction with 6M HCl
mild, = H2, InCl3
reaction with 15M HNO3
mild, = In(NO3)3
reaction with 6M NaOH
none
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Other Forms
number of isotopes
2
hydride(s)
oxide(s)
In2O3
chloride(s)
InCl InCl3
Radius
ionic radius (2- ion)
pm
ionic radius (1- ion)
pm
atomic radius
167 pm
ionic radius (1+ ion)
pm
ionic radius (2+ ion)
pm
ionic radius (3+ ion)
94 pm
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Conductivity
thermal conductivity
81.8 J/m-sec-deg
electrical conductivity
119.474 1/mohm-cm
polarizability
9.7 A^3
Abundance
source
Zn/Pb smelting by-product
rel. abund. solar system
-0.735 log
abundance earth's crust
-1 log
cost, pure
120 $/100g
cost, bulk
$/100g
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