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Molybdenum Silver Comparison

Molybdenum
Silver
Silver Molybdenum comparison


Periodic Table
Symbol
Mo  
Ag  
Group Number
6  
12
11  
7
Period Number
5  
5  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
7439987  
99+
7440224  
99+
Space Group Name
Im_ 3m  
Fm_ 3m  
Space Group Number
229.00  
2
225.00  
3
Facts
Interesting Facts
  • Molybdenum is highly reactive metal, hence not found free in nature .
  • Till 18th century Molybdenum element were often mistaken as a carbon or Lead.
  
  • 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 Wilhelm Scheele  
-  
Discovery
In 1778  
Before 5000 BC  
Abundance
  
  
Abundance In Universe
0.00 %  
20
0.00 %  
27
Abundance In Sun
0.00 %  
19
0.00 %  
26
Abundance In Meteorites
0.00 %  
24
0.00 %  
38
Abundance In Earth's Crust
0.00 %  
39
0.00 %  
99+
Abundance In Oceans
0.00 %  
9
0.00 %  
19
Abundance In Humans
0.00 %  
17
0.00 %  
24
Uses
Uses & Benefits
  • Its alloys are used to make engine parts, drills, saw blade, etc.
  • Lubricant additive made up of Molybdenum disulfide is commonly used in the industry. It is also used as a catalyst.
  
  • 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, Electrical Industry, Electronic Industry  
Chemical Industry, Clothing Industry, Electrical Industry  
Medical Uses
-  
Dentistry, Pharmaceutical Industry  
Other Uses
Alloys  
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues  
Biological Properties
  
  
Toxicity
Toxic  
Non Toxic  
Present in Human Body
Yes  
Yes  
In Blood
0.00 Blood/mg dm-3  
31
0.00 Blood/mg dm-3  
29
In Bone
0.70 p.p.m.  
20
0.44 p.p.m.  
24
Physical
Melting Point
2,617.00 °C  
5
961.93 °C  
99+
Boiling Point
4,612.00 °C  
9
2,212.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Gray  
Silvery White  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
5.50  
7
2.50  
15
Brinell Hardness
1,370.00 MPa  
7
251.00 MPa  
99+
Vickers Hardness
1,400.00 MPa  
11
229.00 MPa  
99+
Speed of Sound
5,400.00 m/s  
9
2,680.00 m/s  
99+
Optical Properties
  
  
Refractive Index
2.00  
15
0.16  
99+
Reflectivity
58.00 %  
25
97.00 %  
1
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Mo  
Ag  
Isotopes
  
  
Known Isotopes
25  
14
36  
3
Electronegativity
  
  
Pauling Electronegativity
2.16  
6
1.93  
10
Sanderson Electronegativity
1.15  
34
1.83  
14
Allred Rochow Electronegativity
1.30  
25
1.42  
19
Mulliken-Jaffe Electronegativity
2.16  
7
1.47  
28
Allen Electronegativity
2.16  
3
1.87  
10
Electropositivity
  
  
Pauling Electropositivity
1.84  
99+
2.07  
99+
Ionization Energies
  
  
1st Energy Level
684.30 kJ/mol  
37
731.00 kJ/mol  
27
2nd Energy Level
1,560.00 kJ/mol  
38
2,070.00 kJ/mol  
11
3rd Energy Level
2,618.00 kJ/mol  
99+
3,361.00 kJ/mol  
19
4th Energy Level
4,480.00 kJ/mol  
36
7,310.00 kJ/mol  
10
5th Energy Level
5,257.00 kJ/mol  
99+
7,310.00 kJ/mol  
24
6th Energy Level
6,640.80 kJ/mol  
99+
7,310.00 kJ/mol  
39
7th Energy level
12,125.00 kJ/mol  
13
7,310.00 kJ/mol  
33
8th Energy Level
13,860.00 kJ/mol  
16
7,310.00 kJ/mol  
31
9th Energy Level
15,835.00 kJ/mol  
16
7,310.00 kJ/mol  
27
10th Energy Level
17,980.00 kJ/mol  
18
7,310.00 kJ/mol  
32
11th Energy Level
20,190.00 kJ/mol  
17
7,310.00 kJ/mol  
31
12th Energy Level
22,219.00 kJ/mol  
38
7,310.00 kJ/mol  
99+
13th Energy Level
26,930.00 kJ/mol  
13
7,310.00 kJ/mol  
25
14th Energy Level
29,196.00 kJ/mol  
13
731.00 kJ/mol  
99+
15th Energy Level
52,490.00 kJ/mol  
99+
73,100.00 kJ/mol  
22
16th Energy Level
55,000.00 kJ/mol  
99+
73,100.00 kJ/mol  
17
17th Energy Level
61,400.00 kJ/mol  
9
731.00 kJ/mol  
38
18th Energy Level
67,700.00 kJ/mol  
9
7,310.00 kJ/mol  
28
19th Energy Level
74,000.00 kJ/mol  
9
731.00 kJ/mol  
35
20th Energy Level
80,400.00 kJ/mol  
10
731.00 kJ/mol  
29
21st Energy Level
87,000.00 kJ/mol  
9
731.00 kJ/mol  
99+
22nd Energy Level
93,400.00 kJ/mol  
7
731.00 kJ/mol  
23
23rd Energy Level
98,420.00 kJ/mol  
6
731.00 kJ/mol  
99+
24th Energy Level
104,400.00 kJ/mol  
2
731.00 kJ/mol  
22
25th Energy Level
121,900.00 kJ/mol  
1
731.00 kJ/mol  
22
26th Energy Level
127,700.00 kJ/mol  
1
731.00 kJ/mol  
22
27th Energy Level
133,800.00 kJ/mol  
1
731.00 kJ/mol  
21
28th Energy Level
139,800.00 kJ/mol  
1
731.00 kJ/mol  
27
29th Energy Level
148,100.00 kJ/mol  
1
731.00 kJ/mol  
28
30th Energy Level
154,500.00 kJ/mol  
1
731.00 kJ/mol  
22
Electrochemical Equivalent
0.89 g/amp-hr  
99+
4.02 g/amp-hr  
7
Electron Work Function
4.60 eV  
17
4.26 eV  
27
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility  
Chemical Stability, Ionization, Solubility  
Atomic
Atomic Number
42  
99+
47  
99+
Electron Configuration
[Kr] 4d5 5s1  
[Kr] 4d10 5s1  
Crystal Structure
Body Centered Cubic (BCC)  
Face Centered Cubic (FCC)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
FCC-Crystal-Structure-of-Silver.jpg#100  
Atom
  
  
Number of Protons
42  
99+
47  
99+
Number of Neutrons
54  
99+
61  
99+
Number of Electrons
42  
99+
47  
99+
Radius of an Atom
  
  
Atomic Radius
139.00 pm  
99+
144.00 pm  
38
Covalent Radius
154.00 pm  
34
145.00 pm  
99+
Van der Waals Radius
200.00 pm  
35
172.00 pm  
99+
Atomic Weight
95.95 amu  
99+
107.87 amu  
99+
Atomic Volume
9.40 cm3/mol  
99+
10.30 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Niobium
  
Palladium
  
Next Element
Technetium
  
Cadmium
  
Valence Electron Potential
88.60 (-eV)  
13
11.40 (-eV)  
99+
Lattice Constant
314.70 pm  
99+
408.53 pm  
23
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.03  
99+
1.59  
26
Mechanical
Density
  
  
Density At Room Temperature
10.28 g/cm3  
39
10.49 g/cm3  
37
Density When Liquid (at m.p.)
9.33 g/cm3  
99+
9.32 g/cm3  
99+
Tensile Strength
324.00 MPa  
15
170.00 MPa  
21
Viscosity
0.00  
5
0.00  
23
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
22
0.00 (Pa)  
14
Vapor Pressure at 2000 K
0.00 (Pa)  
27
0.00 (Pa)  
38
Elasticity properties
  
  
Shear Modulus
126.00 GPa  
8
30.00 GPa  
27
Bulk Modulus
230.00 GPa  
6
100.00 GPa  
16
Young's Modulus
329.00 GPa  
6
83.00 GPa  
25
Poisson Ratio
0.31  
13
0.37  
7
Other Mechanical Properties
Ductile, Weldable  
Ductile, Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
10.22  
40
10.50  
39
Magnetic Ordering
Paramagnetic  
Diamagnetic  
Permeability
0.00 H/m  
9
0.00 H/m  
17
Susceptibility
0.00  
29
0.00  
32
Electrical Properties
  
  
Electrical Property
Semiconductor  
Conductor  
Resistivity
53.40 nΩ·m  
99+
15.87 nΩ·m  
99+
Electrical Conductivity
0.19 106/cm Ω  
11
0.63 106/cm Ω  
1
Electron Affinity
71.90 kJ/mol  
16
125.60 kJ/mol  
5
Thermal
Specific Heat
0.25 J/(kg K)  
21
0.24 J/(kg K)  
25
Molar Heat Capacity
24.06 J/mol·K  
99+
25.35 J/mol·K  
99+
Thermal Conductivity
138.00 W/m·K  
12
429.00 W/m·K  
1
Critical Temperature
2,896.00 K  
6
1,235.00 K  
99+
Thermal Expansion
4.80 µm/(m·K)  
99+
18.90 µm/(m·K)  
25
Enthalpy
  
  
Enthalpy of Vaporization
594.10 kJ/mol  
9
255.10 kJ/mol  
99+
Enthalpy of Fusion
27.61 kJ/mol  
5
11.30 kJ/mol  
37
Enthalpy of Atomization
653.00 kJ/mol  
7
284.50 kJ/mol  
99+
Standard Molar Entropy
28.70 J/mol.K  
99+
42.60 J/mol.K  
99+
Summary >>
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