Home
 Compare Metals

Cs Element
Cesium


Periodic Table
Symbol
Cs
Group Number
1 17
Period Number
6 2
Block
s block
Element Family
Alkali
CAS Number
7440462 40
Space Group Name
Im_ 3m
Space Group Number
229.00 2
Facts
Interesting Facts
Cesium is the most alkaline metal and is used in atomic clocks.
Sources
Earth's crust, Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Robert Bunsen and Gustav Kirchhoff
Discovery
In 1860
Abundance
Abundance In Universe
0.00 % 25
Abundance In Sun
0.00 % 20
Abundance In Meteorites
0.00 % 38
Abundance In Earth's Crust
0.00 % 35
Abundance In Oceans
0.00 % 17
Abundance In Humans
0.00 % 20
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.
Industrial Uses
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry
Medical Uses
-
Other Uses
Alloys
Biological Properties
Toxicity
Mildly Toxic
Present in Human Body
Yes
In Blood
0.00 Blood/mg dm-3 28
In Bone
0.05 p.p.m. 31
Physical
Melting Point
28.50 °C 80
Boiling Point
678.40 °C 77
Appearance
Physical State
Solid
Color
Silvery Gold
Luster
-
Hardness
Mohs Hardness
0.20 27
Brinell Hardness
0.14 MPa 71
Vickers Hardness
0.14 MPa 72
Speed of Sound
1,630.00 m/s 64
Optical Properties
Refractive Index
1.93 17
Reflectivity
35.00 % 34
Allotropes
No
α Allotropes
-
β Allotropes
-
γ Allotropes
-
Chemical
Chemical Formula
Cs
Isotopes
Known Isotopes
36 3
Electronegativity
Pauling Electronegativity
0.79 53
Sanderson Electronegativity
0.22 53
Allred Rochow Electronegativity
0.86 42
Mulliken-Jaffe Electronegativity
0.62 55
Allen Electronegativity
0.66 68
Electropositivity
Pauling Electropositivity
3.21 2
Ionization Energies
1st Energy Level
375.70 kJ/mol 90
2nd Energy Level
2,234.30 kJ/mol 8
3rd Energy Level
3,400.00 kJ/mol 16
4th Energy Level
375.70 kJ/mol 87
5th Energy Level
3,750.00 kJ/mol 84
6th Energy Level
3,750.00 kJ/mol 89
7th Energy level
3,750.00 kJ/mol 82
8th Energy Level
3,760.00 kJ/mol 81
9th Energy Level
3,750.00 kJ/mol 83
10th Energy Level
3,757.00 kJ/mol 77
11th Energy Level
3,757.00 kJ/mol 82
12th Energy Level
3,750.00 kJ/mol 85
13th Energy Level
3,750.00 kJ/mol 81
14th Energy Level
3,750.00 kJ/mol 59
15th Energy Level
37,500.00 kJ/mol 83
16th Energy Level
375.70 kJ/mol 85
17th Energy Level
375.70 kJ/mol 92
18th Energy Level
3,757.00 kJ/mol 79
19th Energy Level
375.70 kJ/mol 92
20th Energy Level
375.00 kJ/mol 82
21st Energy Level
375.70 kJ/mol 91
22nd Energy Level
375.00 kJ/mol 78
23rd Energy Level
375.70 kJ/mol 87
24th Energy Level
375.70 kJ/mol 88
25th Energy Level
375.70 kJ/mol 80
26th Energy Level
375.70 kJ/mol 88
27th Energy Level
375.70 kJ/mol 84
28th Energy Level
375.70 kJ/mol 87
29th Energy Level
375.70 kJ/mol 89
30th Energy Level
375.70 kJ/mol 82
Electrochemical Equivalent
4.96 g/amp-hr 3
Electron Work Function
2.14 eV 58
Other Chemical Properties
Chemical Stability, Corrosion, Ionization, Radioactive Isotopes, Solubility
Atomic
Atomic Number
55 61
Electron Configuration
[Xe] 6s1
Crystal Structure
Body Centered Cubic (BCC)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
Atom
Number of Protons
55 60
Number of Neutrons
78 44
Number of Electrons
55 60
Radius of an Atom
Atomic Radius
265.00 pm 2
Covalent Radius
244.00 pm 2
Van der Waals Radius
343.00 pm 2
Atomic Weight
132.91 amu 55
Atomic Volume
71.07 cm3/mol 1
Adjacent Atomic Numbers
Previous Element
2
Next Element
28
Valence Electron Potential
8.62 (-eV) 71
Lattice Constant
614.10 pm 5
Lattice Angles
π/2, π/2, π/2
Lattice C/A Ratio
1.87 3
Mechanical
Density
Density At Room Temperature
1.93 g/cm3 81
Density When Liquid (at m.p.)
1.84 g/cm3 83
Tensile Strength
15.00 MPa 48
Viscosity
0.00 25
Vapor Pressure
Vapor Pressure at 1000 K
0.00 (Pa) 22
Vapor Pressure at 2000 K
0.00 (Pa) 30
Elasticity properties
Shear Modulus
30.00 GPa 27
Bulk Modulus
1.60 GPa 66
Young's Modulus
1.70 GPa 73
Poisson Ratio
0.35 9
Other Mechanical Properties
Ductile
Magnetic
Magnetic Characteristics
Specific Gravity
1.87 80
Magnetic Ordering
Paramagnetic
Permeability
0.00 H/m 17
Susceptibility
0.00 24
Electrical Properties
Electrical Property
Semiconductor
Resistivity
205.00 nΩ·m 17
Electrical Conductivity
0.05 106/cm Ω 40
Electron Affinity
45.50 kJ/mol 30
Thermal
Specific Heat
0.24 J/(kg K) 23
Molar Heat Capacity
32.21 J/mol·K 6
Thermal Conductivity
35.90 W/m·K 37
Critical Temperature
1,938.00 K 22
Thermal Expansion
97.00 µm/(m·K) 1
Enthalpy
Enthalpy of Vaporization
65.90 kJ/mol 84
Enthalpy of Fusion
2.10 kJ/mol 71
Enthalpy of Atomization
78.20 kJ/mol 72
Standard Molar Entropy
85.20 J/mol.K 3
Summary >>
<< Thermal

Alkali Metals

Compare Alkali Metals

Alkali Metals

» More Alkali Metals

Compare Alkali Metals

» More Compare Alkali Metals
Home | About | Contact | Disclaimer | Terms of use
© A softusvista inc. venture!