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Americium Properties
Americium


Physical
0
Melting Point
994.00 °C 45
Boiling Point
2,607.00 °C 41
Hardness
0
Mohs Hardness
Not Available 0
Brinell Hardness
Not Available 0
Vickers Hardness
Not Available 0
Optical Properties
0
Refractive Index
Not Available 0
Reflectivity
Not Available 0
Speed of Sound
Not Available 0
Allotropes
No 0
α Allotropes
Not Available 0
β Allotropes
Not Available 0
γ Allotropes
Not Available 0
Chemical
0
Chemical Formula
Am 0
Isotopes
0
Known Isotopes
16 23
Electronegativity
0
Pauling Electronegativity
1.30 32
Sanderson Electronegativity
Not Available 0
Allred Rochow Electronegativity
1.20 27
Mulliken-Jaffe Electronegativity
Not Available 0
Allen Electronegativity
Not Available 0
Electropositivity
0
Pauling Electropositivity
2.70 22
Ionization Energies
0
1st Energy Level
578.00 kJ/mol 65
2nd Energy Level
1,158.00 kJ/mol 67
3rd Energy Level
2,132.00 kJ/mol 68
Electrochemical Equivalent
3.02 g/amp-hr 17
Electron Work Function
Not Available 0
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility 0
Mechanical
0
Density
0
Density At Room Temperature
12.00 g/cm3 30
Density When Liquid (at m.p.)
Not Available 0
Vapor Pressure
0
Vapor Pressure at 1000 K
0.00 (Pa) 13
Vapor Pressure at 2000 K
Not Available 0
Tensile Strength
Not Available 0
Viscosity
Not Available 0
Elasticity properties
0
Shear Modulus
Not Available 0
Bulk Modulus
Not Available 0
Young's Modulus
Not Available 0
Poisson Ratio
Not Available 0
Other Mechanical Properties
NA 0
Periodic Table
0
Symbol
Am 0
Group Number
Not Available 0
Period Number
7 1
Block
f block 0
Element Family
Actinide 0
Atomic
0
Atomic Number
95 23
Atomic Weight
243.00 amu 20
Atomic Volume
17.86 cm3/mol 29
Electron Configuration
[Rn] 5f7 7s2 0
Valence Electron Potential
44.00 (-eV) 40
Atom
0
Number of Protons
95 23
Number of Neutrons
148 12
Number of Electrons
95 23
Crystal Structure
Double Hexagonal Close Packed (DHCP) 0
Crystal Lattice
DHCP-Crystal-Structure-of-Americium.jpg#100 0
Radius of an Atom
0
Atomic Radius
173.00 pm 21
Covalent Radius
180.00 pm 21
Van der Waals Radius
244.00 pm 10
Lattice Constant
346.81 pm 44
Lattice Angles
π/2, π/2, 2 π/3 0
Lattice C/A Ratio
Not Available 0
Adjacent Atomic Numbers
0
Next Element
83 0
Previous Element
26 0
Magnetic
0
Electrical Properties
0
Resistivity
0.69 nΩ·m 66
Electrical Conductivity
0.02 106/cm Ω 43
Electron Affinity
Not Available 0
Electrical Property
Unknown 0
Magnetic Characteristics
0
Specific Gravity
13.67 15
Magnetic Ordering
Paramagnetic 0
Permeability
Not Available 0
Susceptibility
Not Available 0
Thermal
0
Specific Heat
0.11 J/(kg K) 41
Thermal Conductivity
10.00 W/m·K 65
Critical Temperature
Not Available 0
Molar Heat Capacity
62.70 J/mol·K 1
Thermal Expansion
Not Available 0
Standard Molar Entropy
Not Available 0
Enthalpy
0
Enthalpy of Vaporization
Not Available 0
Enthalpy of Fusion
14.39 kJ/mol 24
Enthalpy of Atomization
268.00 kJ/mol 40
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