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Cesium
Cesium




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Cs Element

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1 Periodic Table

1.1 Symbol

Cs

1.2 Group Number

1
Rank: 17 (Overall)
Gadolinium Metal
0 17

1.3 Period Number

6
Rank: 2 (Overall)
Lithium Metal
2 7

1.4 Block

s block

1.5 Element Family

Alkali

1.6 CAS Number

7440462
Rank: 40 (Overall)
Aluminium Metal
7429905 54386242

1.7 Space Group Name

Im_ 3m

1.8 Space Group Number

229.00
Rank: 1 (Overall)
Plutonium Metal
11 229

2 Facts

2.1 Interesting Facts

Not Available

2.2 Sources

Earth's crust, Found in Minerals, Mining, Ores of Minerals

2.3 History

2.3.1 Who Discovered

Robert Bunsen and Gustav Kirchhoff

2.3.2 Discovery

In 1860

2.4 Abundance

2.4.1 Abundance In Universe

8 * 10-8 %
Rank: 24 (Overall)
Thallium Metal
5E-09 0.11

2.4.2 Abundance In Sun

~0.0000008 %
Rank: 20 (Overall)
Beryllium Metal
1E-08 0.1

2.4.3 Abundance In Meteorites

0.00 %
Rank: 38 (Overall)
Gold Metal
1.7E-07 22

2.4.4 Abundance In Earth's Crust

0.00 %
Rank: 35 (Overall)
Radium Metal
9.9E-12 8.1

2.4.5 Abundance In Oceans

0.00 %
Rank: 17 (Overall)
Protactinium Metal
2E-23 1.1

2.4.6 Abundance In Humans

0.00 %
Rank: 17 (Overall)
Radium Metal
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.

3.1.1 Industrial Uses

Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry

3.1.2 Medical Uses

NA

3.1.3 Other Uses

Alloys

3.2 Biological Properties

3.2.1 Toxicity

Mildly Toxic

3.2.2 Present in Human Body

83% - Alkali Metals Metals have it !

3.2.3 In Blood

0.00 Blood/mg dm-3
Rank: 28 (Overall)
Plutonium Metal
0 1970

3.2.4 In Bone

0.05 p.p.m.
Rank: 26 (Overall)
Plutonium Metal
0 170000

4 Physical

4.1 Melting Point

28.50 °C
Rank: 80 (Overall)
Francium Metal
27 3410

4.2 Boiling Point

678.40 °C
Rank: 75 (Overall)
Flerovium Metal
147 5660

4.3 Appearance

4.3.1 Physical State

Solid

4.3.2 Color

Silvery Gold

4.3.3 Luster

NA

4.4 Hardness

4.4.1 Mohs Hardness

0.20
Rank: 25 (Overall)
Tin
0.2 8.5

4.4.2 Brinell Hardness

0.14 MPa
Rank: 56 (Overall)
Palladium
0.14 3490

4.4.3 Vickers Hardness

Not Available
Rank: N/A (Overall)
Palladium Metal
121 3430

4.5 Speed of Sound

Not Available
Rank: N/A (Overall)
Thallium Metal
818 16200

4.6 Optical Properties

4.6.1 Refractive Index

Not Available
Rank: N/A (Overall)
Mercury Metal
1.000933 1.7229

4.6.2 Reflectivity

Not Available
Rank: N/A (Overall)
Molybdenum Metal
58 97

4.7 Allotropes

No - Alkali Metals Metals has it !

4.7.1 α Allotropes

Not Available

4.7.2 β Allotropes

Not Available

4.7.3 γ Allotropes

Not Available

5 Chemical

5.1 Chemical Formula

Cs

5.2 Isotopes

5.2.1 Known Isotopes

36
Rank: 3 (Overall)
Tennessine Metal
0 38

5.3 Electronegativity

5.3.1 Pauling Electronegativity

0.79
Rank: 52 (Overall)
Francium Metal
0.7 2.54

5.3.2 Sanderson Electronegativity

0.22
Rank: 33 (Overall)
Sodium
0.22 2.56

5.3.3 Allred Rochow Electronegativity

0.86
Rank: 41 (Overall)
Potassium
0.86 1.82

5.3.4 Mulliken-Jaffe Electronegativity

0.62
Rank: 26 (Overall)
Sodium
0.62 2.48

5.3.5 Allen Electronegativity

0.66
Rank: 48 (Overall)
Francium
0.659 2.7

5.4 Electropositivity

5.4.1 Pauling Electropositivity

3.21
Rank: 2 (Overall)
Gold Metal
1.46 3.3

5.5 Ionization Energies

5.5.1 1st Energy Level

375.70 kJ/mol
Rank: 90 (Overall)
Palladium
375.7 26130

5.5.2 2nd Energy Level

2,234.30 kJ/mol
Rank: 8 (Overall)
Ruthenium Metal
710.2162 28750

5.5.3 3rd Energy Level

3,400.00 kJ/mol
Rank: 16 (Overall)
Osmium Metal
1600 34230

5.5.4 4th Energy Level

Not Available
Rank: N/A (Overall)
Thorium Metal
2780 37066

5.5.5 5th Energy Level

Not Available
Rank: N/A (Overall)
Dubnium Metal
4305.2 97510

5.5.6 6th Energy Level

Not Available
Rank: N/A (Overall)
Seaborgium Metal
5715.8 105800

5.5.7 7th Energy level

Not Available
Rank: N/A (Overall)
Bohrium Metal
7226.8 114300

5.5.8 8th Energy Level

Not Available
Rank: N/A (Overall)
Hassium Metal
8857.4 125300

5.5.9 9th Energy Level

Not Available
Rank: N/A (Overall)
Yttrium Metal
14110 134700

5.5.10 10th Energy Level

Not Available
Rank: N/A (Overall)
Strontium Metal
17100 144300

5.5.11 11th Energy Level

Not Available
Rank: N/A (Overall)
Yttrium Metal
19900 169988

5.5.12 12th Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum Metal
22219 189368

5.5.13 13th Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum Metal
26930 76015

5.5.14 14th Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum Metal
29196 86450

5.5.15 15th Energy Level

Not Available
Rank: N/A (Overall)
Manganese Metal
41987 97510

5.5.16 16th Energy Level

Not Available
Rank: N/A (Overall)
Iron Metal
47206 109480

5.5.17 17th Energy Level

Not Available
Rank: N/A (Overall)
Cobalt Metal
52737 122200

5.5.18 18th Energy Level

Not Available
Rank: N/A (Overall)
Nickel Metal
58570 134810

5.5.19 19th Energy Level

Not Available
Rank: N/A (Overall)
Copper Metal
64702 148700

5.5.20 20th Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum Metal
80400 171200

5.5.21 21st Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum Metal
87000 179100

5.5.22 22nd Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum Metal
93400 184900

5.5.23 23rd Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum Metal
98420 198800

5.5.24 24th Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum Metal
104400 195200

5.5.25 25th Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum Metal
121900 121900

5.5.26 26th Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum Metal
127700 127700

5.5.27 27th Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum Metal
133800 133800

5.5.28 28th Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum Metal
139800 139800

5.5.29 29th Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum Metal
148100 148100

5.5.30 30th Energy Level

Not Available
Rank: N/A (Overall)
Molybdenum Metal
154500 154500

5.6 Electrochemical Equivalent

4.96 g/amp-hr
Rank: 3 (Overall)
Beryllium Metal
0.16812 8.3209

5.7 Electron Work Function

2.14 eV
Rank: 46 (Overall)
Potassium
2.14 5.65

5.8 Other Chemical Properties

Chemical Stability, Corrosion, Ionization, Radioactive Isotopes, Solubility

6 Atomic

6.1 Atomic Number

55
Rank: 61 (Overall)
Lithium Metal
3 117

6.2 Electron Configuration

[Xe] 6s1

6.3 Crystal Structure

Body Centered Cubic (BCC)

6.3.1 Crystal Lattice

6.4 Atom

6.4.1 Number of Protons

55
Rank: 60 (Overall)
Lithium Metal
3 117

6.4.2 Number of Neutrons

78
Rank: 43 (Overall)
Lithium Metal
4 184

6.4.3 Number of Electrons

55
Rank: 60 (Overall)
Lithium Metal
3 117

6.5 Radius of an Atom

6.5.1 Atomic Radius

265.00 pm
Rank: 1 (Overall)
Beryllium Metal
112 265

6.5.2 Covalent Radius

244.00 pm
Rank: 2 (Overall)
Beryllium Metal
96 260

6.5.3 Van der Waals Radius

343.00 pm
Rank: 2 (Overall)
Zinc Metal
139 348

6.6 Atomic Weight

132.91 amu
Rank: 55 (Overall)
Lithium Metal
6.94 294

6.7 Atomic Volume

71.07 cm3/mol
Rank: 1 (Overall)
Manganese Metal
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)
Rank: 66 (Overall)
Francium Metal
8 392.42

6.10 Lattice Constant

614.10 pm
Rank: 5 (Overall)
Beryllium Metal
228.58 891.25

6.11 Lattice Angles

π/2, π/2, π/2

6.12 Lattice C/A Ratio

Not Available
Rank: N/A (Overall)
Beryllium Metal
1.567 1.886

7 Mechanical

7.1 Density

7.1.1 Density At Room Temperature

1.93 g/cm3
Rank: 76 (Overall)
Lithium Metal
0.534 40.7

7.1.2 Density When Liquid (at m.p.)

1.84 g/cm3
Rank: 53 (Overall)
Lithium Metal
0.512 20

7.2 Tensile Strength

Not Available
Rank: N/A (Overall)
Indium Metal
2.5 11000

7.3 Viscosity

Not Available
Rank: N/A (Overall)
Mercury Metal
0.001526 0.001526

7.4 Vapor Pressure

7.4.1 Vapor Pressure at 1000 K

Not Available
Rank: N/A (Overall)
Cerium Metal
2.47E-11 121

7.4.2 Vapor Pressure at 2000 K

Not Available
Rank: N/A (Overall)
Tungsten Metal
2.62E-10 774

7.5 Elasticity properties

7.5.1 Shear Modulus

Not Available
Rank: N/A (Overall)
Potassium Metal
1.3 222

7.5.2 Bulk Modulus

1.60 GPa
Rank: 50 (Overall)
Tin
1.6 462

7.5.3 Young's Modulus

1.70 GPa
Rank: 58 (Overall)
Palladium
1.7 528

7.6 Poisson Ratio

Not Available
Rank: N/A (Overall)
Beryllium Metal
0.032 0.47

7.7 Other Mechanical Properties

Ductile

8 Magnetic

8.1 Magnetic Characteristics

8.1.1 Specific Gravity

1.87
Rank: 64 (Overall)
Lithium Metal
0.53 4500

8.1.2 Magnetic Ordering

Paramagnetic

8.1.3 Permeability

Not Available
Rank: N/A (Overall)
Bismuth Metal
1.25643E-06 0.0063

8.1.4 Susceptibility

Not Available
Rank: N/A (Overall)
Bismuth Metal
-0.000166 200000

8.2 Electrical Properties

8.2.1 Electrical Property

Semiconductor

8.2.2 Resistivity

205.00 nΩ·m
Rank: 17 (Overall)
Thallium Metal
0.18 961

8.2.3 Electrical Conductivity

0.05 106/cm Ω
Rank: 35 (Overall)
Plutonium Metal
0.00666 0.63

8.2.4 Electron Affinity

45.50 kJ/mol
Rank: 25 (Overall)
Mercury Metal
0 222.8

9 Thermal

9.1 Specific Heat

0.24 J/(kg K)
Rank: 23 (Overall)
Americium Metal
0.11 3.6

9.2 Molar Heat Capacity

32.21 J/mol·K
Rank: 4 (Overall)
Beryllium Metal
16.443 62.7

9.3 Thermal Conductivity

35.90 W/m·K
Rank: 36 (Overall)
Neptunium Metal
6.3 429

9.4 Critical Temperature

1,938.00 K
Rank: 5 (Overall)
Ytterbium Metal
26.3 3223

9.5 Thermal Expansion

97.00 µm/(m·K)
Rank: 1 (Overall)
Tungsten Metal
4.5 97

9.6 Enthalpy

9.6.1 Enthalpy of Vaporization

65.90 kJ/mol
Rank: 57 (Overall)
Zinc Metal
7.32 799.1

9.6.2 Enthalpy of Fusion

2.10 kJ/mol
Rank: 63 (Overall)
Tin
2.1 35.23

9.6.3 Enthalpy of Atomization

78.20 kJ/mol
Rank: 60 (Overall)
Mercury Metal
61.5 837

9.7 Standard Molar Entropy

85.20 J/mol.K
Rank: 3 (Overall)
Beryllium Metal
9.5 198.1