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

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Cadmium

Cadmium Element Properties

d47
Ag
Silver
d48
Cd
Cadmium
p49
In
Indium
General
NameCadmium
SymbolCd
Number48
Group Number12
GroupTransition metals
Blockd
Density8.65 g/cm3
Atomic Weight112.41 g/mol
Atomic Volume13.1 cm3/mol
Discover1817


States
StateSolid
Melting Point594.22 K
Boiling Point1040 K
Triple PointNil
Critical PointNil
Heat of Fusion6.21 kJ/mol
Heat of Vaporization99.87 kJ/mol


Energies
First Ionization Energy867.7 kJ/mole
Second Ionization Energy1631.4 kJ/mole
Third Ionization Energy3616.2 kJ/mole
Electronegativity1.69
Electron AffinityNil
Specific Heat0.23 J/gK
Heat Atomization112 kJ/mole atoms


Oxidation and Electrons
Shells2,8,18,18,2
Electron Configuration[Kr] 4d10 5s2
Minimum Oxidation Number0
Maximum Oxidation Number2
Minimum Common Oxidation Number0
Maximum Common Oxidation Number2


Appearance and Characteristics
Crystal Structurehexagonal
Characteristicssoft
Colorbluish-white
Usesbattery,yel. pigment(CdS)
Hardness2 mohs
ToxicityNone


Reactions
Reaction with Airmild, w/ht =>CdO
Reaction with 6M HClmild, =>H2, Cd(Cl)2
Reaction with 15M HNO3mild, =>Cd(NO3)2, NOx
Reaction with 6M NaOHNone


Other Forms
Number of Isotopes8
HydrideNone
OxideCdO
ChlorideCdCl2


Radius
Atomic Radius151 pm
Ionic Radius (1+ ion)Nil
Ionic Radius (1- ion)Nil
Ionic Radius (2+ ion)109 pm
Ionic Radius (2- ion)Nil
Ionic Radius (3+ ion)Nil


Conductivity
Thermal Conductivity96.9 J/m-sec-deg
Electrical Conductivity146.413 1/mohm-cm
Polarizability7.2 A3


Abundance
SourceSphalerite (sulfide)
Relation Abundance Solar System0.207 log
Abundance Earth's Crust-0.7 log


d47
Ag
Silver
d48
Cd
Cadmium
p49
In
Indium




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