Properties of Gold and Americium
Melting Point
1,064.43 °C
  
99+
Boiling Point
2,807.00 °C
  
36
2,607.00 °C
  
99+
Hardness
  
  
Mohs Hardness
Not Available
  
Brinell Hardness
194.00 MPa
  
99+
Not Available
  
Vickers Hardness
Not Available
  
Optical Properties
  
  
Refractive Index
Not Available
  
Not Available
  
Reflectivity
Not Available
  
Speed of Sound
2,030.00 m/s
  
99+
Not Available
  
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Au
  
Am
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Not Available
  
Not Available
  
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Not Available
  
Allen Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
890.10 kJ/mol
  
8
578.00 kJ/mol
  
99+
2nd Energy Level
1,980.00 kJ/mol
  
12
1,158.00 kJ/mol
  
99+
3rd Energy Level
Not Available
  
2,132.00 kJ/mol
  
99+
Electrochemical Equivalent
2.45 g/amp-hr
  
21
3.02 g/amp-hr
  
17
Electron Work Function
Not Available
  
Other Chemical Properties
Density
  
  
Density At Room Temperature
19.30 g/cm3
  
15
12.00 g/cm3
  
30
Density When Liquid (at m.p.)
Not Available
  
Vapor Pressure
  
  
Vapor Pressure at 2000 K
Not Available
  
Tensile Strength
Not Available
  
Viscosity
Not Available
  
Not Available
  
Elasticity properties
  
  
Shear Modulus
Not Available
  
Bulk Modulus
Not Available
  
Young's Modulus
Not Available
  
Poisson Ratio
Not Available
  
Other Mechanical Properties
NA
  
Symbol
Au
  
Am
  
Group Number
Not Available
  
Period Number
6
  
7
  
Atomic Volume
10.20 cm3/mol
  
99+
17.86 cm3/mol
  
29
Electron Configuration
[Xe] 4f14 5d10 6s1
  
[Rn] 5f7 7s2
  
Valence Electron Potential
43.40 (-eV)
  
99+
44.00 (-eV)
  
40
Atom
  
  
Crystal Lattice
FCC-Crystal-Structure-of-Gold.jpg#100
  
DHCP-Crystal-Structure-of-Americium.jpg#100
  
Radius of an Atom
  
  
Lattice Angles
π/2, π/2, π/2
  
π/2, π/2, 2 π/3
  
Lattice C/A Ratio
Not Available
  
Adjacent Atomic Numbers
  
  
Electrical Properties
  
  
Electrical Conductivity
0.45 106/cm Ω
  
3
0.02 106/cm Ω
  
99+
Electron Affinity
222.80 kJ/mol
  
1
Not Available
  
Electrical Property
Unknown
  
Magnetic Characteristics
  
  
Permeability
Not Available
  
Not Available
  
Susceptibility
Not Available
  
Not Available
  
Specific Heat
0.13 J/(kg K)
  
39
0.11 J/(kg K)
  
99+
Thermal Conductivity
318.00 W/m·K
  
3
10.00 W/m·K
  
99+
Critical Temperature
Not Available
  
Not Available
  
Molar Heat Capacity
25.42 J/mol·K
  
40
62.70 J/mol·K
  
1
Thermal Expansion
14.20 µm/(m·K)
  
26
Not Available
  
Standard Molar Entropy
47.40 J/mol.K
  
32
Not Available
  
Enthalpy
  
  
Enthalpy of Vaporization
324.40 kJ/mol
  
27
Not Available
  
Enthalpy of Fusion
12.55 kJ/mol
  
27
14.39 kJ/mol
  
24
Enthalpy of Atomization
364.00 kJ/mol
  
25
268.00 kJ/mol
  
40