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Silver vs Molybdenum

Silver
Molybdenum
Molybdenum vs Silver


Periodic Table
Symbol
Ag  
Mo  
Group Number
11  
7
6  
12
Period Number
5  
5  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
7440224  
99+
7439987  
99+
Space Group Name
Fm_ 3m  
Im_ 3m  
Space Group Number
225.00  
2
229.00  
1
Facts
Interesting Facts
  • 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.
  
  • Molybdenum is highly reactive metal, hence not found free in nature .
  • Till 18th century Molybdenum element were often mistaken as a carbon or Lead.
  
Sources
Earth's crust, Found in Minerals, Ores of metals  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Unknown  
Carl Wilhelm Scheele  
Discovery
Before 5000 BC  
In 1778  
Abundance
  
  
Abundance In Universe
6 * 10-8 %  
26
5 * 10-7 %  
19
Abundance In Sun
~0.0000001 %  
26
~0.0000009 %  
19
Abundance In Meteorites
0.00 %  
38
0.00 %  
24
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
39
Abundance In Oceans
0.00 %  
19
0.00 %  
9
Abundance In Humans
Not Available  
0.00 %  
14
Uses
Uses & Benefits
  • Silver is mainly used for Jewelry and show piece.
  • It is used for manufacturing high quality mirrors due to its reflectivity property.
  
  • 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.
  
Industrial Uses
Chemical Industry, Clothing Industry, Electrical Industry  
Aerospace Industry, Electrical Industry, Electronic Industry  
Medical Uses
Dentistry, Pharmaceutical Industry  
NA  
Other Uses
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues  
Alloys  
Biological Properties
  
  
Toxicity
Non Toxic  
Toxic  
Present in Human Body
Yes  
Yes  
In Blood
0.00 Blood/mg dm-3  
29
0.00 Blood/mg dm-3  
31
In Bone
0.44 p.p.m.  
20
0.70 p.p.m.  
18
Physical Properties
Melting Point
961.93 °C  
99+
2,617.00 °C  
5
Boiling Point
2,212.00 °C  
99+
4,612.00 °C  
9
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Gray  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
2.50  
14
5.50  
7
Brinell Hardness
251.00 MPa  
37
1,370.00 MPa  
7
Vickers Hardness
229.00 MPa  
30
1,400.00 MPa  
6
Speed of Sound
2,680.00 m/s  
34
5,400.00 m/s  
6
Optical Properties
  
  
Reflectivity
97.00 %  
1
58.00 %  
15
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
Ag  
Mo  
Isotopes
  
  
Known Isotopes
36  
3
25  
14
Electronegativity
  
  
Pauling Electronegativity
1.93  
9
2.16  
5
Sanderson Electronegativity
1.83  
11
1.15  
19
Allred Rochow Electronegativity
1.42  
18
1.30  
24
Mulliken-Jaffe Electronegativity
1.47  
15
Not Available  
Allen Electronegativity
1.87  
7
2.16  
3
Electropositivity
  
  
Pauling Electropositivity
2.07  
99+
1.84  
99+
Ionization Energies
  
  
1st Energy Level
731.00 kJ/mol  
27
684.30 kJ/mol  
37
2nd Energy Level
2,070.00 kJ/mol  
11
1,560.00 kJ/mol  
37
3rd Energy Level
3,361.00 kJ/mol  
19
2,618.00 kJ/mol  
99+
4th Energy Level
Not Available  
4,480.00 kJ/mol  
26
5th Energy Level
Not Available  
5,257.00 kJ/mol  
32
6th Energy Level
Not Available  
6,640.80 kJ/mol  
22
7th Energy level
Not Available  
12,125.00 kJ/mol  
13
8th Energy Level
Not Available  
13,860.00 kJ/mol  
16
9th Energy Level
Not Available  
15,835.00 kJ/mol  
16
10th Energy Level
Not Available  
17,980.00 kJ/mol  
18
11th Energy Level
Not Available  
20,190.00 kJ/mol  
17
12th Energy Level
Not Available  
22,219.00 kJ/mol  
15
13th Energy Level
Not Available  
26,930.00 kJ/mol  
13
14th Energy Level
Not Available  
29,196.00 kJ/mol  
13
15th Energy Level
Not Available  
52,490.00 kJ/mol  
7
16th Energy Level
Not Available  
55,000.00 kJ/mol  
8
17th Energy Level
Not Available  
61,400.00 kJ/mol  
9
18th Energy Level
Not Available  
67,700.00 kJ/mol  
9
19th Energy Level
Not Available  
74,000.00 kJ/mol  
9
20th Energy Level
Not Available  
80,400.00 kJ/mol  
10
21st Energy Level
Not Available  
87,000.00 kJ/mol  
9
22nd Energy Level
Not Available  
93,400.00 kJ/mol  
7
23rd Energy Level
Not Available  
98,420.00 kJ/mol  
6
24th Energy Level
Not Available  
104,400.00 kJ/mol  
2
25th Energy Level
Not Available  
121,900.00 kJ/mol  
1
26th Energy Level
Not Available  
127,700.00 kJ/mol  
1
27th Energy Level
Not Available  
133,800.00 kJ/mol  
1
28th Energy Level
Not Available  
139,800.00 kJ/mol  
1
29th Energy Level
Not Available  
148,100.00 kJ/mol  
1
30th Energy Level
Not Available  
154,500.00 kJ/mol  
1
Electrochemical Equivalent
4.02 g/amp-hr  
7
0.89 g/amp-hr  
99+
Electron Work Function
4.26 eV  
20
4.60 eV  
12
Other Chemical Properties
Chemical Stability, Ionization, Solubility  
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility  
Atomic Properties
Atomic Number
47  
99+
42  
99+
Electron Configuration
[Kr] 4d10 5s1  
[Kr] 4d5 5s1  
Crystal Structure
Face Centered Cubic (FCC)  
Body Centered Cubic (BCC)  
Crystal Lattice
FCC-Crystal-Structure-of-Silver.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
47  
99+
42  
99+
Number of Neutrons
61  
99+
54  
99+
Number of Electrons
47  
99+
42  
99+
Radius of an Atom
  
  
Atomic Radius
144.00 pm  
36
139.00 pm  
39
Covalent Radius
145.00 pm  
39
154.00 pm  
32
Van der Waals Radius
172.00 pm  
38
200.00 pm  
28
Atomic Weight
107.87 amu  
99+
95.95 amu  
99+
Atomic Volume
10.30 cm3/mol  
99+
9.40 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Palladium
  
Niobium
  
Next Element
Cadmium
  
Technetium
  
Valence Electron Potential
11.40 (-eV)  
99+
88.60 (-eV)  
13
Lattice Constant
408.53 pm  
20
314.70 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
Not Available  
Not Available  
Mechanical Properties
Density
  
  
Density At Room Temperature
10.49 g/cm3  
35
10.28 g/cm3  
36
Density When Liquid (at m.p.)
9.32 g/cm3  
21
9.33 g/cm3  
20
Tensile Strength
Not Available  
324.00 MPa  
13
Viscosity
Not Available  
Not Available  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
14
Not Available  
Vapor Pressure at 2000 K
Not Available  
0.00 (Pa)  
26
Elasticity properties
  
  
Shear Modulus
30.00 GPa  
23
126.00 GPa  
8
Bulk Modulus
100.00 GPa  
16
230.00 GPa  
6
Young's Modulus
83.00 GPa  
23
329.00 GPa  
6
Poisson Ratio
0.37  
7
0.31  
13
Other Mechanical Properties
Ductile, Malleable  
Ductile, Weldable  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
10.50  
26
10.22  
27
Magnetic Ordering
Diamagnetic  
Paramagnetic  
Susceptibility
0.00  
5
Not Available  
Electrical Properties
  
  
Electrical Property
Conductor  
Semiconductor  
Resistivity
15.87 nΩ·m  
99+
53.40 nΩ·m  
99+
Electrical Conductivity
0.63 106/cm Ω  
1
0.19 106/cm Ω  
11
Electron Affinity
125.60 kJ/mol  
5
71.90 kJ/mol  
14
Thermal Properties
Specific Heat
0.24 J/(kg K)  
25
0.25 J/(kg K)  
21
Molar Heat Capacity
25.35 J/mol·K  
99+
24.06 J/mol·K  
99+
Thermal Conductivity
429.00 W/m·K  
1
138.00 W/m·K  
12
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
18.90 µm/(m·K)  
23
4.80 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
255.10 kJ/mol  
37
594.10 kJ/mol  
8
Enthalpy of Fusion
11.30 kJ/mol  
31
27.61 kJ/mol  
5
Enthalpy of Atomization
284.50 kJ/mol  
37
653.00 kJ/mol  
7
Standard Molar Entropy
42.60 J/mol.K  
35
28.70 J/mol.K  
99+
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