Properties of Nickel and Copper
Melting Point
1,453.00 °C
  
31
1,084.62 °C
  
40
Boiling Point
2,732.00 °C
  
38
2,562.00 °C
  
99+
Hardness
  
  
Optical Properties
  
  
Refractive Index
Not Available
  
Not Available
  
Speed of Sound
4,900.00 m/s
  
12
3,810.00 m/s
  
19
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Ni
  
Cu
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
737.10 kJ/mol
  
25
745.50 kJ/mol
  
22
2nd Energy Level
1,753.00 kJ/mol
  
25
1,957.90 kJ/mol
  
15
3rd Energy Level
3,395.00 kJ/mol
  
17
3,555.00 kJ/mol
  
15
Electrochemical Equivalent
1.10 g/amp-hr
  
99+
1.19 g/amp-hr
  
99+
Other Chemical Properties
Density
  
  
Density At Room Temperature
8.91 g/cm3
  
99+
8.96 g/cm3
  
99+
Density When Liquid (at m.p.)
Vapor Pressure
  
  
Vapor Pressure at 2000 K
Not Available
  
Tensile Strength
Not Available
  
Viscosity
Not Available
  
Not Available
  
Elasticity properties
  
  
Other Mechanical Properties
Symbol
Ni
  
Cu
  
Period Number
4
  
4
  
Atomic Volume
6.59 cm3/mol
  
99+
7.10 cm3/mol
  
99+
Electron Configuration
[Ar] 3d8 4s2 Or [Ar] 3d9 4s1
  
[Ar] 3d10 4s1
  
Valence Electron Potential
42.00 (-eV)
  
99+
34.00 (-eV)
  
99+
Atom
  
  
Crystal Lattice
FCC-Crystal-Structure-of-Nickel.jpg#100
  
FCC-Crystal-Structure-of-Copper.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+
Electrical Conductivity
0.14 106/cm Ω
  
13
0.60 106/cm Ω
  
2
Electron Affinity
112.00 kJ/mol
  
6
222.80 kJ/mol
  
1
Magnetic Characteristics
  
  
Magnetic Ordering
Ferromagnetic
  
Permeability
1.256629 * 10-6 H/m
  
5
Susceptibility
-9.63 * 10-6
  
4
Specific Heat
0.44 J/(kg K)
  
13
0.38 J/(kg K)
  
15
Thermal Conductivity
90.90 W/m·K
  
18
401.00 W/m·K
  
2
Critical Temperature
Not Available
  
Not Available
  
Molar Heat Capacity
26.07 J/mol·K
  
31
24.44 J/mol·K
  
99+
Thermal Expansion
13.40 µm/(m·K)
  
28
16.50 µm/(m·K)
  
25
Standard Molar Entropy
29.90 J/mol.K
  
99+
33.20 J/mol.K
  
99+
Enthalpy
  
  
Enthalpy of Vaporization
371.80 kJ/mol
  
20
283.70 kJ/mol
  
33
Enthalpy of Fusion
17.57 kJ/mol
  
14
7.11 kJ/mol
  
99+
Enthalpy of Atomization
422.60 kJ/mol
  
17
338.90 kJ/mol
  
29