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Lanthanum Silver Comparison

Lanthanum
Silver
Silver Lanthanum comparison


Periodic Table
Symbol
La  
Ag  
Group Number
3  
15
11  
7
Period Number
6  
5  
Block
f block  
d block  
Element Family
Lanthanide  
Transition Metal  
CAS Number
7439910  
99+
7440224  
99+
Space Group Name
P63/mmc  
Fm_ 3m  
Space Group Number
194.00  
7
225.00  
3
Facts
Interesting Facts
  • Lanthanum metal is highly malleable, ductile and sectile.
  • If exposed to air Lanthanum metal oxidizes rapidly.
  
  • 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
Carl Gustaf Mosander  
-  
Discovery
In 1838  
Before 5000 BC  
Abundance
  
  
Abundance In Universe
0.00 %  
23
0.00 %  
27
Abundance In Sun
0.00 %  
25
0.00 %  
26
Abundance In Meteorites
0.00 %  
32
0.00 %  
38
Abundance In Earth's Crust
0.00 %  
19
0.00 %  
99+
Abundance In Oceans
0.00 %  
29
0.00 %  
19
Abundance In Humans
0.00 %  
24
0.00 %  
24
Uses
Uses & Benefits
  • It has no commercial uses, but its alloys are in high demand. Lanthanum and Nickel alloy is used for the hydrogen gas storage.
  • The best-known use for mischmetal alloy of Lanthanum is; as a ‘flints’ for cigarette lighters.
  
  • Silver is mainly used for Jewelry and show piece.
  • It is used for manufacturing high quality mirrors due to its reflectivity property.
  
Industrial Uses
Electrical Industry, Electronic Industry  
Chemical Industry, Clothing Industry, Electrical Industry  
Medical Uses
-  
Dentistry, Pharmaceutical Industry  
Other Uses
Alloys, Mirror Manufacturing  
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues  
Biological Properties
  
  
Toxicity
Low Toxic  
Non Toxic  
Present in Human Body
Yes  
Yes  
In Blood
0.00 Blood/mg dm-3  
32
0.00 Blood/mg dm-3  
29
In Bone
0.08 p.p.m.  
29
0.44 p.p.m.  
24
Physical
Melting Point
920.00 °C  
99+
961.93 °C  
99+
Boiling Point
3,469.00 °C  
19
2,212.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silvery White  
Luster
-  
Metallic  
Hardness
  
  
Mohs Hardness
2.50  
15
2.50  
15
Brinell Hardness
350.00 MPa  
36
251.00 MPa  
99+
Vickers Hardness
360.00 MPa  
99+
229.00 MPa  
99+
Speed of Sound
2,475.00 m/s  
99+
2,680.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.80  
22
0.16  
99+
Reflectivity
70.00 %  
13
97.00 %  
1
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
La  
Ag  
Isotopes
  
  
Known Isotopes
31  
8
36  
3
Electronegativity
  
  
Pauling Electronegativity
1.10  
99+
1.93  
10
Sanderson Electronegativity
1.10  
38
1.83  
14
Allred Rochow Electronegativity
1.08  
32
1.42  
19
Mulliken-Jaffe Electronegativity
1.10  
99+
1.47  
28
Allen Electronegativity
1.10  
99+
1.87  
10
Electropositivity
  
  
Pauling Electropositivity
2.90  
10
2.07  
99+
Ionization Energies
  
  
1st Energy Level
538.10 kJ/mol  
99+
731.00 kJ/mol  
27
2nd Energy Level
1,067.00 kJ/mol  
99+
2,070.00 kJ/mol  
11
3rd Energy Level
1,850.30 kJ/mol  
99+
3,361.00 kJ/mol  
19
4th Energy Level
4,819.00 kJ/mol  
32
7,310.00 kJ/mol  
10
5th Energy Level
5,940.00 kJ/mol  
99+
7,310.00 kJ/mol  
24
6th Energy Level
5,380.00 kJ/mol  
99+
7,310.00 kJ/mol  
39
7th Energy level
5,380.00 kJ/mol  
99+
7,310.00 kJ/mol  
33
8th Energy Level
5,380.00 kJ/mol  
99+
7,310.00 kJ/mol  
31
9th Energy Level
5,380.00 kJ/mol  
99+
7,310.00 kJ/mol  
27
10th Energy Level
5,380.00 kJ/mol  
99+
7,310.00 kJ/mol  
32
11th Energy Level
5,380.00 kJ/mol  
99+
7,310.00 kJ/mol  
31
12th Energy Level
5,380.00 kJ/mol  
99+
7,310.00 kJ/mol  
99+
13th Energy Level
5,380.00 kJ/mol  
99+
7,310.00 kJ/mol  
25
14th Energy Level
5,380.00 kJ/mol  
99+
731.00 kJ/mol  
99+
15th Energy Level
53,800.00 kJ/mol  
99+
73,100.00 kJ/mol  
22
16th Energy Level
53,800.00 kJ/mol  
99+
73,100.00 kJ/mol  
17
17th Energy Level
538.10 kJ/mol  
99+
731.00 kJ/mol  
38
18th Energy Level
5,380.00 kJ/mol  
99+
7,310.00 kJ/mol  
28
19th Energy Level
538.10 kJ/mol  
99+
731.00 kJ/mol  
35
20th Energy Level
538.00 kJ/mol  
99+
731.00 kJ/mol  
29
21st Energy Level
538.10 kJ/mol  
99+
731.00 kJ/mol  
99+
22nd Energy Level
538.00 kJ/mol  
99+
731.00 kJ/mol  
23
23rd Energy Level
5,380.00 kJ/mol  
25
731.00 kJ/mol  
99+
24th Energy Level
538.00 kJ/mol  
99+
731.00 kJ/mol  
22
25th Energy Level
538.00 kJ/mol  
99+
731.00 kJ/mol  
22
26th Energy Level
538.00 kJ/mol  
99+
731.00 kJ/mol  
22
27th Energy Level
538.10 kJ/mol  
99+
731.00 kJ/mol  
21
28th Energy Level
538.00 kJ/mol  
99+
731.00 kJ/mol  
27
29th Energy Level
538.10 kJ/mol  
99+
731.00 kJ/mol  
28
30th Energy Level
538.00 kJ/mol  
99+
731.00 kJ/mol  
22
Electrochemical Equivalent
1.73 g/amp-hr  
99+
4.02 g/amp-hr  
7
Electron Work Function
3.50 eV  
99+
4.26 eV  
27
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility  
Chemical Stability, Ionization, Solubility  
Atomic
Atomic Number
57  
99+
47  
99+
Electron Configuration
[Xe] 5d2 6s2  
[Kr] 4d10 5s1  
Crystal Structure
Double Hexagonal Close Packed (DHCP)  
Face Centered Cubic (FCC)  
Crystal Lattice
DHCP-Crystal-Structure-of-Lanthanum.jpg#100  
FCC-Crystal-Structure-of-Silver.jpg#100  
Atom
  
  
Number of Protons
57  
99+
47  
99+
Number of Neutrons
82  
99+
61  
99+
Number of Electrons
57  
99+
47  
99+
Radius of an Atom
  
  
Atomic Radius
187.00 pm  
10
144.00 pm  
38
Covalent Radius
207.00 pm  
6
145.00 pm  
99+
Van der Waals Radius
240.00 pm  
17
172.00 pm  
99+
Atomic Weight
138.91 amu  
99+
107.87 amu  
99+
Atomic Volume
20.73 cm3/mol  
26
10.30 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Barium
  
Palladium
  
Next Element
Cerium
  
Cadmium
  
Valence Electron Potential
40.71 (-eV)  
99+
11.40 (-eV)  
99+
Lattice Constant
377.20 pm  
31
408.53 pm  
23
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, π/2  
Lattice C/A Ratio
1.62  
16
1.59  
26
Mechanical
Density
  
  
Density At Room Temperature
6.16 g/cm3  
99+
10.49 g/cm3  
37
Density When Liquid (at m.p.)
5.94 g/cm3  
99+
9.32 g/cm3  
99+
Tensile Strength
45.00 MPa  
40
170.00 MPa  
21
Viscosity
0.00  
25
0.00  
23
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
22
0.00 (Pa)  
14
Vapor Pressure at 2000 K
0.98 (Pa)  
15
0.00 (Pa)  
38
Elasticity properties
  
  
Shear Modulus
14.30 GPa  
99+
30.00 GPa  
27
Bulk Modulus
27.90 GPa  
99+
100.00 GPa  
16
Young's Modulus
36.60 GPa  
99+
83.00 GPa  
25
Poisson Ratio
0.28  
17
0.37  
7
Other Mechanical Properties
Ductile  
Ductile, Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
6.17  
99+
10.50  
39
Magnetic Ordering
Paramagnetic  
Diamagnetic  
Permeability
0.00 H/m  
15
0.00 H/m  
17
Susceptibility
0.00  
25
0.00  
32
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
615.00 nΩ·m  
7
15.87 nΩ·m  
99+
Electrical Conductivity
0.01 106/cm Ω  
99+
0.63 106/cm Ω  
1
Electron Affinity
48.00 kJ/mol  
28
125.60 kJ/mol  
5
Thermal
Specific Heat
0.19 J/(kg K)  
33
0.24 J/(kg K)  
25
Molar Heat Capacity
27.11 J/mol·K  
27
25.35 J/mol·K  
99+
Thermal Conductivity
13.40 W/m·K  
99+
429.00 W/m·K  
1
Critical Temperature
1,193.00 K  
99+
1,235.00 K  
99+
Thermal Expansion
12.10 µm/(m·K)  
99+
18.90 µm/(m·K)  
25
Enthalpy
  
  
Enthalpy of Vaporization
399.60 kJ/mol  
24
255.10 kJ/mol  
99+
Enthalpy of Fusion
6.20 kJ/mol  
99+
11.30 kJ/mol  
37
Enthalpy of Atomization
431.00 kJ/mol  
21
284.50 kJ/mol  
99+
Standard Molar Entropy
56.90 J/mol.K  
31
42.60 J/mol.K  
99+
Summary >>
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