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Properties of Samarium and Lead

Samarium
Lead
Properties of Lead & Samarium


Physical Properties
Melting Point
1,072.00 °C   
99+
327.50 °C   
99+
Boiling Point
1,900.00 °C   
99+
1,740.00 °C   
99+
Hardness
  
  
Mohs Hardness
Not Available   
1.50   
18
Brinell Hardness
441.00 MPa   
27
38.00 MPa   
99+
Vickers Hardness
412.00 MPa   
24
Not Available   
Optical Properties
  
  
Refractive Index
Not Available   
Not Available   
Reflectivity
Not Available   
Not Available   
Speed of Sound
2,130.00 m/s   
99+
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 Properties
Chemical Formula
Sm   
Pb   
Isotopes
  
  
Known Isotopes
30   
9
35   
4
Electronegativity
  
  
Pauling Electronegativity
1.17   
40
1.87   
13
Sanderson Electronegativity
Not Available   
2.29   
4
Allred Rochow Electronegativity
1.07   
32
1.55   
11
Mulliken-Jaffe Electronegativity
Not Available   
2.41   
2
Allen Electronegativity
Not Available   
1.85   
8
Electropositivity
  
  
Pauling Electropositivity
2.83   
14
1.67   
99+
Ionization Energies
  
  
1st Energy Level
544.50 kJ/mol   
99+
715.60 kJ/mol   
31
2nd Energy Level
1,070.00 kJ/mol   
99+
1,450.50 kJ/mol   
99+
3rd Energy Level
2,260.00 kJ/mol   
99+
3,081.50 kJ/mol   
23
Electrochemical Equivalent
1.87 g/amp-hr   
34
3.87 g/amp-hr   
9
Electron Work Function
2.70 eV   
99+
4.25 eV   
21
Other Chemical Properties
?
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   
?
Anti-corrosion metals have the protection on their surfaces which protect them from corroding in corrosive environments.Anti 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   
Mechanical Properties
Density
  
  
Density At Room Temperature
7.52 g/cm3   
99+
11.34 g/cm3   
33
Density When Liquid (at m.p.)
7.16 g/cm3   
32
10.66 g/cm3   
15
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.94 (Pa)   
9
1.64 (Pa)   
7
Vapor Pressure at 2000 K
Not Available   
Not Available   
Tensile Strength
Not Available   
12.00 MPa   
20
Viscosity
Not Available   
Not Available   
Elasticity properties
  
  
Shear Modulus
19.50 GPa   
34
5.60 GPa   
99+
Bulk Modulus
37.80 GPa   
35
46.00 GPa   
24
Young's Modulus
49.70 GPa   
37
16.00 GPa   
99+
Poisson Ratio
0.27   
19
0.44   
3
Other Mechanical Properties
NA   
?
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   
Periodic Table
Symbol
Sm   
Pb   
Group Number
Not Available   
14   
4
Period Number
6   
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 p-block is on the right side of the periodic table and includes elements from the six columns beginning with column 13 and ending with column 18. Helium, though being in the top of group 18, is not included in the p-block.p block   
Element Family
?
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   
?
All post transition metals are placed in group number 13, 14 and 15 of periodic table. In fact, they are located between Transition Metals and Metalloids. Post transition metals have very poor mechanical properties.Post-​Transition   
Atomic Properties
Atomic Number
62   
99+
82   
34
Atomic Weight
150.36 amu   
99+
207.20 amu   
30
Atomic Volume
19.95 cm3/mol   
19
18.17 cm3/mol   
27
Electron Configuration
[Xe] 4f6 6s2   
[Xe] 4f14 5d10 6s2 6p2   
Valence Electron Potential
44.80 (-eV)   
37
24.20 (-eV)   
99+
Atom
  
  
Number of Protons
62   
99+
82   
34
Number of Neutrons
88   
39
125   
19
Number of Electrons
62   
99+
82   
34
Crystal Structure
?
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)   
?
In crystallography, the cubic (or isometric) crystal system is a crystal system where the unit cell is in the shape of a cube. This is one of the most common and simplest shapes found in crystals and minerals.Face Centered Cubic (FCC)   
Crystal Lattice
RHO-Crystal-Structure-of-Samarium.jpg#100   
FCC-Crystal-Structure-of-Lead.jpg#100   
Radius of an Atom
  
  
Atomic Radius
180.00 pm   
14
175.00 pm   
19
Covalent Radius
198.00 pm   
13
146.00 pm   
38
Van der Waals Radius
229.00 pm   
20
202.00 pm   
27
Lattice Constant
362.10 pm   
33
495.08 pm   
16
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
Adjacent Atomic Numbers
  
  
Next Element
Europium
  
Bismuth
  
Previous Element
Promethium
  
Thallium
  
Magnetic Properties
Electrical Properties
  
  
Resistivity
0.94 nΩ·m   
99+
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
Electrical Property
?
Conductor metals have very low resistance to electric currents. They can easily conduct electric current through them.Conductor   
?
Poor conductor metals have moderate resistance to electric currents. They can conduct electric current through them with very low efficiency.Poor Conductor   
Magnetic Characteristics
  
  
Specific Gravity
7.52   
99+
11.35   
25
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   
?
Diamagnetic metals produce a magnetic field opposite to the applied magnetic field. Thus, they are repelled by magnets and show magnetic nature.Diamagnetic   
Permeability
Not Available   
Not Available   
Susceptibility
Not Available   
Not Available   
Thermal Properties
Specific Heat
0.20 J/(kg K)   
31
0.13 J/(kg K)   
39
Thermal Conductivity
13.30 W/m·K   
99+
35.30 W/m·K   
38
Critical Temperature
Not Available   
Not Available   
Molar Heat Capacity
29.54 J/mol·K   
7
26.65 J/mol·K   
26
Thermal Expansion
12.70 µm/(m·K)   
30
28.90 µm/(m·K)   
13
Standard Molar Entropy
69.60 J/mol.K   
15
64.80 J/mol.K   
17
Enthalpy
  
  
Enthalpy of Vaporization
166.40 kJ/mol   
99+
179.40 kJ/mol   
99+
Enthalpy of Fusion
8.62 kJ/mol   
40
4.77 kJ/mol   
99+
Enthalpy of Atomization
209.00 kJ/mol   
99+
194.60 kJ/mol   
99+
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