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Samarium vs Silver

Samarium
Silver
Silver vs Samarium


Periodic Table
Symbol
Sm   
Ag   
Group Number
Not Available   
11   
7
Period Number
6   
5   
Block
f block   
d block   
Element Family
Lanthanide   
Transition Metal   
CAS Number
7440199   
99+
7440224   
99+
Space Group Name
R_ 3m   
Fm_ 3m   
Space Group Number
166.00   
6
225.00   
2
Facts
Interesting Facts
  • Samarium metals helps stimulating body metabolism.
  • Samarium metals was 1st observed by Jean Charles Galissard de Marignac in Dydimia in 1853.
  
  • It is the most reflective element.
  • Silver is the second most ductile metal after Gold.
  • It is also used in Dentistry as a dental alloys for clips and crowning.
  
Sources
Found in Minerals, Mining, Ores of Minerals   
Earth's crust, Found in Minerals, Ores of metals   
History
  
  
Who Discovered
Lecoq de Boisbaudran   
Unknown   
Discovery
In 1879   
Before 5000 BC   
Abundance
  
  
Abundance In Universe
5 * 10-7 %   
19
6 * 10-8 %   
26
Abundance In Sun
~0.0000001 %   
26
~0.0000001 %   
26
Abundance In Meteorites
0.00 %   
37
0.00 %   
38
Abundance In Earth's Crust
0.00 %   
29
0.00 %   
99+
Abundance In Oceans
0.00 %   
40
0.00 %   
19
Uses
Uses & Benefits
  • Magnets of Samarium cobalt alloy are stronger than that of Iron and hence, they are used in microwave application.
  • Samarium metal also used in optical lasers and infrared absorbing glasses and as a neutron absorber.
  
  • Silver is mainly used for Jewelry and show piece.
  • It is used for manufacturing high quality mirrors due to its reflectivity property.
  
Industrial Uses
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry   
Chemical Industry, Clothing Industry, Electrical Industry   
Medical Uses
NA   
Dentistry, Pharmaceutical Industry   
Other Uses
Alloys, In Nuclear Reactors   
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues   
Biological Properties
  
  
Toxicity
Slightly Toxic   
Non Toxic   
Present in Human Body
Yes   
Yes   
In Blood
0.01 Blood/mg dm-3   
22
0.00 Blood/mg dm-3   
29
In Bone
Not Available   
0.44 p.p.m.   
20
Physical Properties
Melting Point
1,072.00 °C   
99+
961.93 °C   
99+
Boiling Point
1,900.00 °C   
99+
2,212.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Silvery White   
Luster
Lustrous   
Metallic   
Hardness
  
  
Mohs Hardness
Not Available   
2.50   
14
Brinell Hardness
441.00 MPa   
27
251.00 MPa   
37
Vickers Hardness
412.00 MPa   
24
229.00 MPa   
30
Speed of Sound
2,130.00 m/s   
99+
2,680.00 m/s   
34
Optical Properties
  
  
Reflectivity
Not Available   
97.00 %   
1
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   
Ag   
Isotopes
  
  
Known Isotopes
30   
9
36   
3
Electronegativity
  
  
Pauling Electronegativity
1.17   
40
1.93   
9
Sanderson Electronegativity
Not Available   
1.83   
11
Allred Rochow Electronegativity
1.07   
32
1.42   
18
Mulliken-Jaffe Electronegativity
Not Available   
1.47   
15
Allen Electronegativity
Not Available   
1.87   
7
Electropositivity
  
  
Pauling Electropositivity
2.83   
14
2.07   
99+
Ionization Energies
  
  
1st Energy Level
544.50 kJ/mol   
99+
731.00 kJ/mol   
27
2nd Energy Level
1,070.00 kJ/mol   
99+
2,070.00 kJ/mol   
11
3rd Energy Level
2,260.00 kJ/mol   
99+
3,361.00 kJ/mol   
19
4th Energy Level
3,990.00 kJ/mol   
37
Not Available   
Electrochemical Equivalent
1.87 g/amp-hr   
34
4.02 g/amp-hr   
7
Electron Work Function
2.70 eV   
99+
4.26 eV   
20
Other Chemical Properties
Ionization, Radioactive Isotopes   
Chemical Stability, Ionization, Solubility   
Atomic Properties
Atomic Number
62   
99+
47   
99+
Electron Configuration
[Xe] 4f6 6s2   
[Kr] 4d10 5s1   
Crystal Structure
Rhombohedral (RHO)   
Face Centered Cubic (FCC)   
Crystal Lattice
RHO-Crystal-Structure-of-Samarium.jpg#100   
FCC-Crystal-Structure-of-Silver.jpg#100   
Atom
  
  
Number of Protons
62   
99+
47   
99+
Number of Neutrons
88   
39
61   
99+
Number of Electrons
62   
99+
47   
99+
Radius of an Atom
  
  
Atomic Radius
180.00 pm   
14
144.00 pm   
36
Covalent Radius
198.00 pm   
13
145.00 pm   
39
Van der Waals Radius
229.00 pm   
20
172.00 pm   
38
Atomic Weight
150.36 amu   
99+
107.87 amu   
99+
Atomic Volume
19.95 cm3/mol   
19
10.30 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Promethium
  
Palladium
  
Next Element
Europium
  
Cadmium
  
Valence Electron Potential
44.80 (-eV)   
37
11.40 (-eV)   
99+
Lattice Constant
362.10 pm   
33
408.53 pm   
20
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
7.52 g/cm3   
99+
10.49 g/cm3   
35
Density When Liquid (at m.p.)
7.16 g/cm3   
32
9.32 g/cm3   
21
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.94 (Pa)   
9
0.00 (Pa)   
14
Elasticity properties
  
  
Shear Modulus
19.50 GPa   
34
30.00 GPa   
23
Bulk Modulus
37.80 GPa   
35
100.00 GPa   
16
Young's Modulus
49.70 GPa   
37
83.00 GPa   
23
Poisson Ratio
0.27   
19
0.37   
7
Other Mechanical Properties
NA   
Ductile, Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
7.52   
99+
10.50   
26
Magnetic Ordering
Paramagnetic   
Diamagnetic   
Susceptibility
Not Available   
0.00   
5
Electrical Properties
  
  
Electrical Property
Conductor   
Conductor   
Resistivity
0.94 nΩ·m   
99+
15.87 nΩ·m   
99+
Electrical Conductivity
0.01 106/cm Ω   
99+
0.63 106/cm Ω   
1
Electron Affinity
50.00 kJ/mol   
21
125.60 kJ/mol   
5
Thermal Properties
Specific Heat
0.20 J/(kg K)   
31
0.24 J/(kg K)   
25
Molar Heat Capacity
29.54 J/mol·K   
7
25.35 J/mol·K   
99+
Thermal Conductivity
13.30 W/m·K   
99+
429.00 W/m·K   
1
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
12.70 µm/(m·K)   
30
18.90 µm/(m·K)   
23
Enthalpy
  
  
Enthalpy of Vaporization
166.40 kJ/mol   
99+
255.10 kJ/mol   
37
Enthalpy of Fusion
8.62 kJ/mol   
40
11.30 kJ/mol   
31
Enthalpy of Atomization
209.00 kJ/mol   
99+
284.50 kJ/mol   
37
Standard Molar Entropy
69.60 J/mol.K   
15
42.60 J/mol.K   
35
Periodic Table >>
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