Properties of Copper and Silver
Melting Point
1,084.62 °C
  
40
Boiling Point
2,562.00 °C
  
99+
2,212.00 °C
  
99+
Hardness
  
  
Optical Properties
  
  
Refractive Index
Not Available
  
Not Available
  
Speed of Sound
3,810.00 m/s
  
19
2,680.00 m/s
  
34
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Cu
  
Ag
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
745.50 kJ/mol
  
22
731.00 kJ/mol
  
27
2nd Energy Level
1,957.90 kJ/mol
  
15
2,070.00 kJ/mol
  
11
3rd Energy Level
3,555.00 kJ/mol
  
15
3,361.00 kJ/mol
  
19
Electrochemical Equivalent
1.19 g/amp-hr
  
99+
4.02 g/amp-hr
  
7
Other Chemical Properties
Density
  
  
Density At Room Temperature
8.96 g/cm3
  
99+
10.49 g/cm3
  
35
Density When Liquid (at m.p.)
Vapor Pressure
  
  
Vapor Pressure at 2000 K
Not Available
  
Not Available
  
Tensile Strength
Not Available
  
Not Available
  
Viscosity
Not Available
  
Not Available
  
Elasticity properties
  
  
Other Mechanical Properties
Symbol
Cu
  
Ag
  
Period Number
4
  
5
  
Atomic Weight
107.87 amu
  
99+
Atomic Volume
7.10 cm3/mol
  
99+
10.30 cm3/mol
  
99+
Electron Configuration
[Ar] 3d10 4s1
  
[Kr] 4d10 5s1
  
Valence Electron Potential
34.00 (-eV)
  
99+
11.40 (-eV)
  
99+
Atom
  
  
Crystal Lattice
FCC-Crystal-Structure-of-Copper.jpg#100
  
FCC-Crystal-Structure-of-Silver.jpg#100
  
Radius of an Atom
  
  
Lattice Angles
π/2, π/2, π/2
  
π/2, π/2, π/2
  
Lattice C/A Ratio
Not Available
  
Not Available
  
Adjacent Atomic Numbers
  
  
Electrical Properties
  
  
Resistivity
16.78 nΩ·m
  
99+
15.87 nΩ·m
  
99+
Electrical Conductivity
0.60 106/cm Ω
  
2
0.63 106/cm Ω
  
1
Electron Affinity
222.80 kJ/mol
  
1
125.60 kJ/mol
  
5
Magnetic Characteristics
  
  
Permeability
1.256629 * 10
-6 H/m
  
5
Not Available
  
Susceptibility
-9.63 * 10-6
  
4
Specific Heat
0.38 J/(kg K)
  
15
0.24 J/(kg K)
  
25
Thermal Conductivity
401.00 W/m·K
  
2
429.00 W/m·K
  
1
Critical Temperature
Not Available
  
Not Available
  
Molar Heat Capacity
24.44 J/mol·K
  
99+
25.35 J/mol·K
  
99+
Thermal Expansion
16.50 µm/(m·K)
  
25
18.90 µm/(m·K)
  
23
Standard Molar Entropy
33.20 J/mol.K
  
99+
42.60 J/mol.K
  
35
Enthalpy
  
  
Enthalpy of Vaporization
283.70 kJ/mol
  
33
255.10 kJ/mol
  
37
Enthalpy of Fusion
7.11 kJ/mol
  
99+
11.30 kJ/mol
  
31
Enthalpy of Atomization
338.90 kJ/mol
  
29
284.50 kJ/mol
  
37