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Properties of Plutonium and Samarium

Plutonium
Samarium
Properties of Samarium & Plutonium


Physical Properties
Melting Point
639.50 °C   
99+
1,072.00 °C   
99+
Boiling Point
3,235.00 °C   
24
1,900.00 °C   
99+
Hardness
  
  
Mohs Hardness
Not Available   
Not Available   
Brinell Hardness
Not Available   
441.00 MPa   
27
Vickers Hardness
Not Available   
412.00 MPa   
24
Optical Properties
  
  
Refractive Index
Not Available   
Not Available   
Reflectivity
Not Available   
Not Available   
Speed of Sound
2,260.00 m/s   
99+
2,130.00 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 Properties
Chemical Formula
Pu   
Sm   
Isotopes
  
  
Known Isotopes
20   
19
30   
9
Electronegativity
  
  
Pauling Electronegativity
1.28   
33
1.17   
40
Sanderson Electronegativity
Not Available   
Not Available   
Allred Rochow Electronegativity
1.22   
26
1.07   
32
Mulliken-Jaffe Electronegativity
Not Available   
Not Available   
Allen Electronegativity
Not Available   
Not Available   
Electropositivity
  
  
Pauling Electropositivity
2.72   
21
2.83   
14
Ionization Energies
  
  
1st Energy Level
584.70 kJ/mol   
99+
544.50 kJ/mol   
99+
2nd Energy Level
1,128.00 kJ/mol   
99+
1,070.00 kJ/mol   
99+
3rd Energy Level
2,084.00 kJ/mol   
99+
2,260.00 kJ/mol   
99+
Electrochemical Equivalent
2.28 g/amp-hr   
22
1.87 g/amp-hr   
34
Electron Work Function
Not Available   
2.70 eV   
99+
Other Chemical Properties
?
Corrosion is a process which converts refined metals to their more stable forms, for example, its oxide and hydroxide. This process of metals getting corroded is a gradual destruction of metals by chemical reactions.Corrosion, 
?
Ionization is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons to form ions, often in conjunction with other chemical changes.Ionization, 
?
Radioactive metals emit particles and radiation from their nuclei. This process comes in the picture because their nuclei experience the intense conflict between two strong forces. This metal also have radioactive isotopes.Radioactive Isotopes, 
?
Radioactive metals emit particles and radiation from their nuclei. This process comes in the picture because their nuclei experience the intense conflict between two strong forces.Radioactivity   
?
Ionization is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons to form ions, often in conjunction with other chemical changes.Ionization, 
?
Radioactive metals emit particles and radiation from their nuclei. This process comes in the picture because their nuclei experience the intense conflict between two strong forces. This metal also have radioactive isotopes.Radioactive Isotopes   
Mechanical Properties
Density
  
  
Density At Room Temperature
19.82 g/cm3   
13
7.52 g/cm3   
99+
Density When Liquid (at m.p.)
16.63 g/cm3   
8
7.16 g/cm3   
32
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)   
26
0.94 (Pa)   
9
Vapor Pressure at 2000 K
2.20 (Pa)   
12
Not Available   
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Elasticity properties
  
  
Shear Modulus
43.00 GPa   
18
19.50 GPa   
34
Bulk Modulus
Not Available   
37.80 GPa   
35
Young's Modulus
96.00 GPa   
21
49.70 GPa   
37
Poisson Ratio
0.21   
32
0.27   
19
Other Mechanical Properties
?
Ductility of metals defines their ability to deform under tensile stress; this is often characterized by the metals ability to be stretched into a wire.Ductile, 
?
Malleability of metals defines their ability to deform under compressive stress; this is often characterized by the metals ability to form a thin sheet by hammering or rolling.Malleable   
NA   
Periodic Table
Symbol
Pu   
Sm   
Group Number
0   
18
Not Available   
Period Number
7   
6   
Block
?
The f-block is in the center-left of a 32-column periodic table but in the footnoted appendage of 18-column tables. These elements are not generally considered as part of any group. They are often called inner transition metals.f block   
?
The f-block is in the center-left of a 32-column periodic table but in the footnoted appendage of 18-column tables. These elements are not generally considered as part of any group. They are often called inner transition metals.f block   
Element Family
?
Total 15 metals are included in actinide series, from Actinium to Lawrencium. Actinide series is located under f and d block of the periodic table.Actinide   
?
Total 15 metals are included in Lanthanide series from Lanthanum to Lutetium. Lanthanide series is located under f and d block of the periodic table.Lanthanide   
Atomic Properties
Atomic Number
94   
24
62   
99+
Atomic Weight
244.00 amu   
19
150.36 amu   
99+
Atomic Volume
12.32 cm3/mol   
99+
19.95 cm3/mol   
19
Electron Configuration
[Rn] 5f6 7s2   
[Xe] 4f6 6s2   
Valence Electron Potential
64.90 (-eV)   
21
44.80 (-eV)   
37
Atom
  
  
Number of Protons
94   
24
62   
99+
Number of Neutrons
150   
11
88   
39
Number of Electrons
94   
24
62   
99+
Crystal Structure
?
The mono-clinic crystal structure is one of the seven lattice point groups. Here vectors of crystal have unequal lengths. Here vectors of crystal have unequal lengths and have two vectors perpendicular to the 3rd oneMonoclinic (MON)   
?
Rhombohedral crystal lattice structure comes under trigonal crystal structure. The Rhombohedral crystal structure is a term associated trigonal crystal structure with the rhombohedral lattice.Rhombohedral (RHO)   
Crystal Lattice
MON-Crystal-Structure-of-Plutonium.jpg#100   
RHO-Crystal-Structure-of-Samarium.jpg#100   
Radius of an Atom
  
  
Atomic Radius
159.00 pm   
28
180.00 pm   
14
Covalent Radius
187.00 pm   
20
198.00 pm   
13
Van der Waals Radius
200.00 pm   
28
229.00 pm   
20
Lattice Constant
618.30 pm   
4
362.10 pm   
33
Lattice Angles
NA   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
Not Available   
Adjacent Atomic Numbers
  
  
Next Element
Americium
  
Europium
  
Previous Element
Neptunium
  
Promethium
  
Magnetic Properties
Electrical Properties
  
  
Resistivity
1.46 nΩ·m   
99+
0.94 nΩ·m   
99+
Electrical Conductivity
0.01 106/cm Ω   
99+
0.01 106/cm Ω   
99+
Electron Affinity
Not Available   
50.00 kJ/mol   
21
Electrical Property
?
Poor conductor metals have moderate resistance to electric currents. They can conduct electric current through them with very low efficiency.Poor Conductor   
?
Conductor metals have very low resistance to electric currents. They can easily conduct electric current through them.Conductor   
Magnetic Characteristics
  
  
Specific Gravity
19.84   
7
7.52   
99+
Magnetic Ordering
?
Paramagnetic metals are slightly attracted by magnet, but they can’t retain the magnetic effect once they are removed from the magnetic field.Paramagnetic   
?
Paramagnetic metals are slightly attracted by magnet, but they can’t retain the magnetic effect once they are removed from the magnetic field.Paramagnetic   
Permeability
Not Available   
Not Available   
Susceptibility
Not Available   
Not Available   
Thermal Properties
Specific Heat
0.13 J/(kg K)   
39
0.20 J/(kg K)   
31
Thermal Conductivity
6.74 W/m·K   
99+
13.30 W/m·K   
99+
Critical Temperature
Not Available   
Not Available   
Molar Heat Capacity
35.50 J/mol·K   
3
29.54 J/mol·K   
7
Thermal Expansion
46.70 µm/(m·K)   
6
12.70 µm/(m·K)   
30
Standard Molar Entropy
Not Available   
69.60 J/mol.K   
15
Enthalpy
  
  
Enthalpy of Vaporization
344.00 kJ/mol   
25
166.40 kJ/mol   
99+
Enthalpy of Fusion
2.82 kJ/mol   
99+
8.62 kJ/mol   
40
Enthalpy of Atomization
360.00 kJ/mol   
26
209.00 kJ/mol   
99+
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