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Cesium
Cesium

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1 Periodic Table
1.1 Symbol
Cs
Ag
1.2 Group Number
111
Gadolinium
0 17
1.3 Period Number
65
Lithium
2 7
1.4 Block
s block
d block
1.5 Element Family
Alkali
Transition Metal
1.6 CAS Number
74404627440224
Aluminium
7429905 54386242
1.7 Space Group Name
Im_ 3m
Fm_ 3m
1.8 Space Group Number
229.00225.00
Plutonium
11 229
2 Facts
2.1 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.
2.2 Sources
Earth's crust, Found in Minerals, Mining, Ores of Minerals
Earth's crust, Found in Minerals, Ores of metals
2.3 History
2.3.1 Who Discovered
Robert Bunsen and Gustav Kirchhoff
Unknown
2.3.2 Discovery
In 1860
Before 5000 BC
2.4 Abundance
2.4.1 Abundance In Universe
8 * 10-8 %6 * 10-8 %
Thallium
5E-09 0.11
2.4.2 Abundance In Sun
~0.0000008 %~0.0000001 %
Beryllium
1E-08 0.1
2.4.3 Abundance In Meteorites
0.00 %0.00 %
Gold
1.7E-07 22
2.4.4 Abundance In Earth's Crust
0.00 %0.00 %
Radium
9.9E-12 8.1
2.4.5 Abundance In Oceans
0.00 %0.00 %
Protactinium
2E-23 1.1
2.4.6 Abundance In Humans
0.00 %NA
Radium
1E-13 1.4
3 Uses
3.1 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.
3.1.1 Industrial Uses
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry
Chemical Industry, Clothing Industry, Electrical Industry
3.1.2 Medical Uses
NA
Dentistry, Pharmaceutical Industry
3.1.3 Other Uses
Alloys
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues
3.2 Biological Properties
3.2.1 Toxicity
Mildly Toxic
Non Toxic
3.2.2 Present in Human Body
3.2.3 In Blood
0.00 Blood/mg dm-30.00 Blood/mg dm-3
Plutonium
0 1970
3.2.4 In Bone
0.05 p.p.m.0.44 p.p.m.
Plutonium
0 170000
4 Physical
4.1 Melting Point
28.50 °C961.93 °C
Francium
27 3410
4.2 Boiling Point
678.40 °C2,212.00 °C
Flerovium
147 5660
4.3 Appearance
4.3.1 Physical State
Solid
Solid
4.3.2 Color
Silvery Gold
Silvery White
4.3.3 Luster
NA
Metallic
4.4 Hardness
4.4.1 Mohs Hardness
0.202.50
Tin
0.2 8.5
4.4.2 Brinell Hardness
0.14 MPa251.00 MPa
Palladium
0.14 3490
4.4.3 Vickers Hardness
NA229.00 MPa
Palladium
121 3430
4.5 Speed of Sound
NA2,680.00 m/s
Thallium
818 16200
4.6 Optical Properties
4.6.1 Refractive Index
NANA
Mercury
1.000933 1.7229
4.6.2 Reflectivity
NA97.00 %
Molybdenum
58 97
4.7 Allotropes
4.7.1 α Allotropes
Not Available
Not Available
4.7.2 β Allotropes
Not Available
Not Available
4.7.3 γ Allotropes
Not Available
Not Available
5 Chemical
5.1 Chemical Formula
Cs
Ag
5.2 Isotopes
5.2.1 Known Isotopes
3636
Tennessine
0 38
5.3 Electronegativity
5.3.1 Pauling Electronegativity
0.791.93
Francium
0.7 2.54
5.3.2 Sanderson Electronegativity
0.221.83
Sodium
0.22 2.56
5.3.3 Allred Rochow Electronegativity
0.861.42
Potassium
0.86 1.82
5.3.4 Mulliken-Jaffe Electronegativity
0.621.47
Sodium
0.62 2.48
5.3.5 Allen Electronegativity
0.661.87
Francium
0.659 2.7
5.4 Electropositivity
5.4.1 Pauling Electropositivity
3.212.07
Gold
1.46 3.3
5.5 Ionization Energies
5.5.1 1st Energy Level
375.70 kJ/mol731.00 kJ/mol
Palladium
375.7 26130
5.5.2 2nd Energy Level
2,234.30 kJ/mol2,070.00 kJ/mol
Ruthenium
710.2162 28750
5.5.3 3rd Energy Level
3,400.00 kJ/mol3,361.00 kJ/mol
Osmium
1600 34230
5.5.4 4th Energy Level
NANA
Thorium
2780 37066
5.5.5 5th Energy Level
NANA
Dubnium
4305.2 97510
5.5.6 6th Energy Level
NANA
Seaborgium
5715.8 105800
5.5.7 7th Energy level
NANA
Bohrium
7226.8 114300
5.5.8 8th Energy Level
NANA
Hassium
8857.4 125300
5.5.9 9th Energy Level
NANA
Yttrium
14110 134700
5.5.10 10th Energy Level
NANA
Strontium
17100 144300
5.5.11 11th Energy Level
NANA
Yttrium
19900 169988
5.5.12 12th Energy Level
NANA
Molybdenum
22219 189368
5.5.13 13th Energy Level
NANA
Molybdenum
26930 76015
5.5.14 14th Energy Level
NANA
Molybdenum
29196 86450
5.5.15 15th Energy Level
NANA
Manganese
41987 97510
5.5.16 16th Energy Level
NANA
Iron
47206 109480
5.5.17 17th Energy Level
NANA
Cobalt
52737 122200
5.5.18 18th Energy Level
NANA
Nickel
58570 134810
5.5.19 19th Energy Level
NANA
Copper
64702 148700
5.5.20 20th Energy Level
NANA
Molybdenum
80400 171200
5.5.21 21st Energy Level
NANA
Molybdenum
87000 179100
5.5.22 22nd Energy Level
NANA
Molybdenum
93400 184900
5.5.23 23rd Energy Level
NANA
Molybdenum
98420 198800
5.5.24 24th Energy Level
NANA
Molybdenum
104400 195200
5.5.25 25th Energy Level
NANA
Molybdenum
121900 121900
5.5.26 26th Energy Level
NANA
Molybdenum
127700 127700
5.5.27 27th Energy Level
NANA
Molybdenum
133800 133800
5.5.28 28th Energy Level
NANA
Molybdenum
139800 139800
5.5.29 29th Energy Level
NANA
Molybdenum
148100 148100
5.5.30 30th Energy Level
NANA
Molybdenum
154500 154500
5.6 Electrochemical Equivalent
4.96 g/amp-hr4.02 g/amp-hr
Beryllium
0.16812 8.3209
5.7 Electron Work Function
2.14 eV4.26 eV
Potassium
2.14 5.65
5.8 Other Chemical Properties
Chemical Stability, Corrosion, Ionization, Radioactive Isotopes, Solubility
Chemical Stability, Ionization, Solubility
6 Atomic
6.1 Atomic Number
5547
Lithium
3 117
6.2 Electron Configuration
[Xe] 6s1
[Kr] 4d10 5s1
6.3 Crystal Structure
Body Centered Cubic (BCC)
Face Centered Cubic (FCC)
6.3.1 Crystal Lattice
6.4 Atom
6.4.1 Number of Protons
5547
Lithium
3 117
6.4.2 Number of Neutrons
7861
Lithium
4 184
6.4.3 Number of Electrons
5547
Lithium
3 117
6.5 Radius of an Atom
6.5.1 Atomic Radius
265.00 pm144.00 pm
Beryllium
112 265
6.5.2 Covalent Radius
244.00 pm145.00 pm
Beryllium
96 260
6.5.3 Van der Waals Radius
343.00 pm172.00 pm
Zinc
139 348
6.6 Atomic Weight
132.91 amu107.87 amu
Lithium
6.94 294
6.7 Atomic Volume
71.07 cm3/mol10.30 cm3/mol
Manganese
1.39 71.07
6.8 Adjacent Atomic Numbers
6.8.1 Previous Element
6.8.2 Next Element
6.9 Valence Electron Potential
8.62 (-eV)11.40 (-eV)
Francium
8 392.42
6.10 Lattice Constant
614.10 pm408.53 pm
Beryllium
228.58 891.25
6.11 Lattice Angles
π/2, π/2, π/2
π/2, π/2, π/2
6.12 Lattice C/A Ratio
NANA
Beryllium
1.567 1.886
7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
1.93 g/cm310.49 g/cm3
Lithium
0.534 40.7
7.1.2 Density When Liquid (at m.p.)
1.84 g/cm39.32 g/cm3
Lithium
0.512 20
7.2 Tensile Strength
NANA
Indium
2.5 11000
7.3 Viscosity
NANA
Mercury
0.001526 0.001526
7.4 Vapor Pressure
7.4.1 Vapor Pressure at 1000 K
NA0.00 (Pa)
Cerium
2.47E-11 121
7.4.2 Vapor Pressure at 2000 K
NANA
Tungsten
2.62E-10 774
7.5 Elasticity properties
7.5.1 Shear Modulus
NA30.00 GPa
Potassium
1.3 222
7.5.2 Bulk Modulus
1.60 GPa100.00 GPa
Tin
1.6 462
7.5.3 Young's Modulus
1.70 GPa83.00 GPa
Palladium
1.7 528
7.6 Poisson Ratio
NA0.37
Beryllium
0.032 0.47
7.7 Other Mechanical Properties
Ductile
Ductile, Malleable
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
1.8710.50
Lithium
0.53 4500
8.1.2 Magnetic Ordering
Paramagnetic
Diamagnetic
8.1.3 Permeability
NANA
Bismuth
1.25643E-06 0.0063
8.1.4 Susceptibility
NA0.00
Bismuth
-0.000166 200000
8.2 Electrical Properties
8.2.1 Electrical Property
Semiconductor
Conductor
8.2.2 Resistivity
205.00 nΩ·m15.87 nΩ·m
Thallium
0.18 961
8.2.3 Electrical Conductivity
0.05 106/cm Ω0.63 106/cm Ω
Plutonium
0.00666 0.63
8.2.4 Electron Affinity
45.50 kJ/mol125.60 kJ/mol
Mercury
0 222.8
9 Thermal
9.1 Specific Heat
0.24 J/(kg K)0.24 J/(kg K)
Americium
0.11 3.6
9.2 Molar Heat Capacity
32.21 J/mol·K25.35 J/mol·K
Beryllium
16.443 62.7
9.3 Thermal Conductivity
35.90 W/m·K429.00 W/m·K
Neptunium
6.3 429
9.4 Critical Temperature
1,938.00 KNA
Ytterbium
26.3 3223
9.5 Thermal Expansion
97.00 µm/(m·K)18.90 µm/(m·K)
Tungsten
4.5 97
9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
65.90 kJ/mol255.10 kJ/mol
Zinc
7.32 799.1
9.6.2 Enthalpy of Fusion
2.10 kJ/mol11.30 kJ/mol
Tin
2.1 35.23
9.6.3 Enthalpy of Atomization
78.20 kJ/mol284.50 kJ/mol
Mercury
61.5 837
9.7 Standard Molar Entropy
85.20 J/mol.K42.60 J/mol.K
Beryllium
9.5 198.1