Cesium Silver Comparison
Periodic Table
Symbol
Cs
Ag
Group Number
1
17
11
7
Period Number
6
5
Block
s block
d block
Element Family
Alkali
Transition Metal
CAS Number
7440462
40
7440224
99+
Space Group Name
Im_ 3m
Fm_ 3m
Space Group Number
229.00
1
225.00
2
Facts
Interesting Facts
Not Available
- 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
Earth's crust, Found in Minerals, Mining, Ores of Minerals
Earth's crust, Found in Minerals, Ores of metals
History
Who Discovered
Robert Bunsen and Gustav Kirchhoff
Unknown
Discovery
In 1860
Before 5000 BC
Abundance
Abundance In Universe
8 * 10-8 %
24
6 * 10-8 %
26
Abundance In Sun
~0.0000008 %
20
~0.0000001 %
26
Abundance In Meteorites
0.00 %
38
0.00 %
38
Abundance In Earth's Crust
0.00 %
35
0.00 %
99+
Abundance In Oceans
0.00 %
17
0.00 %
19
Abundance In Humans
0.00 %
17
Not Available
Uses
Uses & Benefits
- The most common use of cesium metal is as a drilling fluid. It is also used in optical glass manufacturing.
- In vacuum tubes and radiation monitor equipment this metal is used as a catalyst promoter.
- 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, Automobile Industry, Electrical Industry, Electronic Industry
Chemical Industry, Clothing Industry, Electrical Industry
Medical Uses
NA
Dentistry, Pharmaceutical Industry
Other Uses
Alloys
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues
Biological Properties
Toxicity
Mildly Toxic
Non Toxic
Present in Human Body
Yes
Yes
In Blood
0.00 Blood/mg dm-3
28
0.00 Blood/mg dm-3
29
In Bone
0.05 p.p.m.
26
0.44 p.p.m.
20
Physical Properties
Melting Point
28.50 °C
99+
961.93 °C
99+
Boiling Point
678.40 °C
99+
2,212.00 °C
99+
Appearance
Physical State
Solid
Solid
Color
Silvery Gold
Silvery White
Luster
NA
Metallic
Hardness
Mohs Hardness
0.20
25
2.50
14
Brinell Hardness
0.14 MPa
99+
251.00 MPa
37
Vickers Hardness
Not Available
229.00 MPa
30
Speed of Sound
Not Available
2,680.00 m/s
34
Optical Properties
Reflectivity
Not Available
97.00 %
1
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
Cs
Ag
Isotopes
Known Isotopes
36
3
36
3
Electronegativity
Pauling Electronegativity
0.79
99+
1.93
9
Sanderson Electronegativity
0.22
33
1.83
11
Allred Rochow Electronegativity
0.86
99+
1.42
18
Mulliken-Jaffe Electronegativity
0.62
26
1.47
15
Allen Electronegativity
0.66
99+
1.87
7
Electropositivity
Pauling Electropositivity
3.21
2
2.07
99+
Ionization Energies
1st Energy Level
375.70 kJ/mol
99+
731.00 kJ/mol
27
2nd Energy Level
2,234.30 kJ/mol
8
2,070.00 kJ/mol
11
3rd Energy Level
3,400.00 kJ/mol
16
3,361.00 kJ/mol
19
Electrochemical Equivalent
4.96 g/amp-hr
3
4.02 g/amp-hr
7
Electron Work Function
2.14 eV
99+
4.26 eV
20
Other Chemical Properties
Chemical Stability, Corrosion, Ionization, Radioactive Isotopes, Solubility
Chemical Stability, Ionization, Solubility
Atomic Properties
Atomic Number
55
99+
47
99+
Electron Configuration
[Xe] 6s1
[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
55
99+
47
99+
Number of Neutrons
78
99+
61
99+
Number of Electrons
55
99+
47
99+
Radius of an Atom
Atomic Radius
265.00 pm
1
144.00 pm
36
Covalent Radius
244.00 pm
2
145.00 pm
39
Van der Waals Radius
343.00 pm
2
172.00 pm
38
Atomic Weight
132.91 amu
99+
107.87 amu
99+
Atomic Volume
71.07 cm3/mol
1
10.30 cm3/mol
99+
Adjacent Atomic Numbers
Valence Electron Potential
8.62 (-eV)
99+
11.40 (-eV)
99+
Lattice Constant
614.10 pm
5
408.53 pm
20
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
1.93 g/cm3
99+
10.49 g/cm3
35
Density When Liquid (at m.p.)
1.84 g/cm3
99+
9.32 g/cm3
21
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
Not Available
0.00 (Pa)
14
Elasticity properties
Shear Modulus
Not Available
30.00 GPa
23
Bulk Modulus
1.60 GPa
99+
100.00 GPa
16
Young's Modulus
1.70 GPa
99+
83.00 GPa
23
Poisson Ratio
Not Available
0.37
7
Other Mechanical Properties
Ductile
Ductile, Malleable
Magnetic Properties
Magnetic Characteristics
Specific Gravity
1.87
99+
10.50
26
Magnetic Ordering
Paramagnetic
Diamagnetic
Susceptibility
Not Available
0.00
5
Electrical Properties
Electrical Property
Semiconductor
Conductor
Resistivity
205.00 nΩ·m
17
15.87 nΩ·m
99+
Electrical Conductivity
0.05 106/cm Ω
35
0.63 106/cm Ω
1
Electron Affinity
45.50 kJ/mol
25
125.60 kJ/mol
5
Thermal Properties
Specific Heat
0.24 J/(kg K)
23
0.24 J/(kg K)
25
Molar Heat Capacity
32.21 J/mol·K
4
25.35 J/mol·K
99+
Thermal Conductivity
35.90 W/m·K
36
429.00 W/m·K
1
Critical Temperature
1,938.00 K
5
Not Available
Thermal Expansion
97.00 µm/(m·K)
1
18.90 µm/(m·K)
23
Enthalpy
Enthalpy of Vaporization
65.90 kJ/mol
99+
255.10 kJ/mol
37
Enthalpy of Fusion
2.10 kJ/mol
99+
11.30 kJ/mol
31
Enthalpy of Atomization
78.20 kJ/mol
99+
284.50 kJ/mol
37
Standard Molar Entropy
85.20 J/mol.K
3
42.60 J/mol.K
35
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