Silver vs Molybdenum
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
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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