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Actinium Properties
f
Actinium
Summary
Periodic Table
Facts
Uses
Physical
Chemical
Atomic
Mechanical
Magnetic
Thermal
Properties
All
Physical
0
Melting Point
1,227.00 °C 38
Boiling Point
3,200.00 °C 26
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
Ac 0
Isotopes
0
Known Isotopes
29 10
Electronegativity
0
Pauling Electronegativity
1.10 44
Sanderson Electronegativity
Not Available 0
Allred Rochow Electronegativity
1.00 36
Mulliken-Jaffe Electronegativity
Not Available 0
Allen Electronegativity
Not Available 0
Electropositivity
0
Pauling Electropositivity
2.90 10
Ionization Energies
0
1st Energy Level
499.00 kJ/mol 84
2nd Energy Level
1,170.00 kJ/mol 65
3rd Energy Level
1,900.00 kJ/mol 79
Electrochemical Equivalent
2.82 g/amp-hr 18
Electron Work Function
Not Available 0
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility 0
Mechanical
0
Density
0
Density At Room Temperature
10.00 g/cm
3
37
Density When Liquid (at m.p.)
Not Available 0
Vapor Pressure
0
Vapor Pressure at 1000 K
Not Available 0
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
Ac 0
Group Number
Not Available 0
Period Number
7 1
Block
f block 0
Element Family
Actinide 0
Atomic
0
Atomic Number
89 29
Atomic Weight
227.00 amu 25
Atomic Volume
22.54 cm3/mol 11
Electron Configuration
[Rn] 6d
1
7s
2
0
Valence Electron Potential
38.60 (-eV) 49
Atom
0
Number of Protons
89 29
Number of Neutrons
138 16
Number of Electrons
89 29
Crystal Structure
Face Centered Cubic (FCC) 0
Crystal Lattice
FCC-Crystal-Structure-of-Actinium.jpg#100 0
Radius of an Atom
0
Atomic Radius
195.00 pm 7
Covalent Radius
Not Available 0
Van der Waals Radius
Not Available 0
Lattice Constant
567.00 pm 8
Lattice Angles
π/2, π/2, π/2 0
Lattice C/A Ratio
Not Available 0
Adjacent Atomic Numbers
0
Next Element
16 0
Previous Element
27 0
Magnetic
0
Electrical Properties
0
Resistivity
Not Available 0
Electrical Conductivity
Not Available 0
Electron Affinity
Not Available 0
Electrical Property
Unknown 0
Magnetic Characteristics
0
Specific Gravity
10.07 28
Magnetic Ordering
Paramagnetic 0
Permeability
Not Available 0
Susceptibility
Not Available 0
Thermal
0
Specific Heat
0.12 J/(kg K) 40
Thermal Conductivity
12.00 W/m·K 60
Critical Temperature
Not Available 0
Molar Heat Capacity
27.20 J/mol·K 18
Thermal Expansion
Not Available 0
Standard Molar Entropy
56.50 J/mol.K 25
Enthalpy
0
Enthalpy of Vaporization
Not Available 0
Enthalpy of Fusion
Not Available 0
Enthalpy of Atomization
301.00 kJ/mol 36
All >>
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