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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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