Properties of Europium and Lead
Boiling Point
1,597.00 °C
  
99+
1,740.00 °C
  
99+
Hardness
  
  
Mohs Hardness
Not Available
  
Brinell Hardness
Not Available
  
Vickers Hardness
Not Available
  
Optical Properties
  
  
Refractive Index
Not Available
  
Not Available
  
Reflectivity
Not Available
  
Not Available
  
Speed of Sound
Not Available
  
1,190.00 m/s
  
99+
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Eu
  
Pb
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Allred Rochow Electronegativity
Not Available
  
Mulliken-Jaffe Electronegativity
Not Available
  
Allen Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Not Available
  
Ionization Energies
  
  
1st Energy Level
547.10 kJ/mol
  
99+
715.60 kJ/mol
  
31
2nd Energy Level
1,085.00 kJ/mol
  
99+
1,450.50 kJ/mol
  
99+
3rd Energy Level
2,404.00 kJ/mol
  
99+
3,081.50 kJ/mol
  
23
Electrochemical Equivalent
1.89 g/amp-hr
  
33
3.87 g/amp-hr
  
9
Other Chemical Properties
Density
  
  
Density At Room Temperature
5.26 g/cm3
  
99+
11.34 g/cm3
  
33
Density When Liquid (at m.p.)
5.13 g/cm3
  
99+
10.66 g/cm3
  
15
Vapor Pressure
  
  
Vapor Pressure at 2000 K
Not Available
  
Not Available
  
Viscosity
Not Available
  
Not Available
  
Elasticity properties
  
  
Other Mechanical Properties
Symbol
Eu
  
Pb
  
Group Number
Not Available
  
Period Number
6
  
6
  
Atomic Weight
151.96 amu
  
99+
Atomic Volume
28.90 cm3/mol
  
8
18.17 cm3/mol
  
27
Electron Configuration
[Xe] 4f7 6s2
  
[Xe] 4f14 5d10 6s2 6p2
  
Valence Electron Potential
45.60 (-eV)
  
35
24.20 (-eV)
  
99+
Atom
  
  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
  
FCC-Crystal-Structure-of-Lead.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
208.00 nΩ·m
  
16
Electrical Conductivity
0.01 106/cm Ω
  
99+
0.05 106/cm Ω
  
36
Electron Affinity
50.00 kJ/mol
  
21
35.10 kJ/mol
  
28
Magnetic Characteristics
  
  
Permeability
Not Available
  
Not Available
  
Susceptibility
Not Available
  
Not Available
  
Specific Heat
0.18 J/(kg K)
  
33
0.13 J/(kg K)
  
39
Thermal Conductivity
13.90 W/m·K
  
99+
35.30 W/m·K
  
38
Critical Temperature
Not Available
  
Not Available
  
Molar Heat Capacity
27.66 J/mol·K
  
16
26.65 J/mol·K
  
26
Thermal Expansion
35.00 µm/(m·K)
  
8
28.90 µm/(m·K)
  
13
Standard Molar Entropy
77.80 J/mol.K
  
4
64.80 J/mol.K
  
17
Enthalpy
  
  
Enthalpy of Vaporization
143.50 kJ/mol
  
99+
179.40 kJ/mol
  
99+
Enthalpy of Fusion
9.21 kJ/mol
  
37
4.77 kJ/mol
  
99+
Enthalpy of Atomization
180.00 kJ/mol
  
99+
194.60 kJ/mol
  
99+