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Cesium vs Meitnerium

Cesium
Meitnerium
Meitnerium vs Cesium


Periodic Table
Symbol
Cs  
Mt  
Group Number
1  
17
9  
9
Period Number
6  
7  
Block
s block  
d block  
Element Family
Alkali  
Probably Transition  
CAS Number
7440462  
40
54038016  
10
Space Group Name
Im_ 3m  
Not Available  
Space Group Number
229.00  
1
Not Available  
Facts
Interesting Facts
Not Available  
Not Available  
Sources
Earth's crust, Found in Minerals, Mining, Ores of Minerals  
Bombarding Bi209 with Accelerated Nuclei of Fe58, Synthetically Produced  
History
  
  
Who Discovered
Robert Bunsen and Gustav Kirchhoff  
Gesellschaft für Schwerionenforschung  
Discovery
In 1860  
In 1982  
Abundance
  
  
Abundance In Universe
8 * 10-8 %  
24
Not Available  
Abundance In Sun
~0.0000008 %  
20
~-9999 %  
Abundance In Meteorites
0.00 %  
38
Not Available  
Abundance In Earth's Crust
0.00 %  
35
Not Available  
Abundance In Oceans
0.00 %  
17
Not Available  
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.
  
  • Currently known uses of Meitnerium metal are limited to research purpose only.
  
Industrial Uses
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry  
NA  
Medical Uses
NA  
NA  
Other Uses
Alloys  
NA  
Biological Properties
  
  
Toxicity
Mildly Toxic  
Unknown  
Present in Human Body
Yes  
No  
In Blood
0.00 Blood/mg dm-3  
28
0.00 Blood/mg dm-3  
37
In Bone
0.05 p.p.m.  
26
0.00 p.p.m.  
36
Physical Properties
Melting Point
28.50 °C  
99+
Not Available  
Boiling Point
678.40 °C  
99+
Not Available  
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery Gold  
Unknown  
Luster
NA  
Unknown Luster  
Hardness
  
  
Mohs Hardness
0.20  
25
Not Available  
Brinell Hardness
0.14 MPa  
99+
Not Available  
Speed of Sound
Not Available  
Not Available  
Optical Properties
  
  
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  
Mt  
Isotopes
  
  
Known Isotopes
36  
3
4  
33
Electronegativity
  
  
Pauling Electronegativity
0.79  
99+
Not Available  
Sanderson Electronegativity
0.22  
33
Not Available  
Allred Rochow Electronegativity
0.86  
99+
Not Available  
Mulliken-Jaffe Electronegativity
0.62  
26
Not Available  
Allen Electronegativity
0.66  
99+
Not Available  
Electropositivity
  
  
Pauling Electropositivity
3.21  
2
Not Available  
Ionization Energies
  
  
1st Energy Level
375.70 kJ/mol  
99+
800.80 kJ/mol  
15
2nd Energy Level
2,234.30 kJ/mol  
8
1,823.60 kJ/mol  
17
3rd Energy Level
3,400.00 kJ/mol  
16
2,904.20 kJ/mol  
31
4th Energy Level
Not Available  
3,859.40 kJ/mol  
99+
5th Energy Level
Not Available  
4,920.80 kJ/mol  
35
Electrochemical Equivalent
4.96 g/amp-hr  
3
Not Available  
Electron Work Function
2.14 eV  
99+
Not Available  
Other Chemical Properties
Chemical Stability, Corrosion, Ionization, Radioactive Isotopes, Solubility  
Ionization, Radioactive Isotopes, Radioactivity  
Atomic Properties
Atomic Number
55  
99+
109  
9
Electron Configuration
[Xe] 6s1  
[Rn] 5f14 6d7 7s2  
Crystal Structure
Body Centered Cubic (BCC)  
Face Centered Cubic (FCC)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
FCC-Crystal-Structure-of-Meitnerium.jpg#100  
Atom
  
  
Number of Protons
55  
99+
109  
9
Number of Neutrons
78  
99+
157  
7
Number of Electrons
55  
99+
109  
9
Radius of an Atom
  
  
Atomic Radius
265.00 pm  
1
122.00 pm  
99+
Covalent Radius
244.00 pm  
2
129.00 pm  
99+
Van der Waals Radius
343.00 pm  
2
Not Available  
Atomic Weight
132.91 amu  
99+
278.00 amu  
7
Atomic Volume
71.07 cm3/mol  
1
Not Available  
Adjacent Atomic Numbers
  
  
Previous Element
Tin
  
Hassium
  
Next Element
Barium
  
Darmstadtium
  
Valence Electron Potential
8.62 (-eV)  
99+
Not Available  
Lattice Constant
614.10 pm  
5
Not Available  
Lattice Angles
π/2, π/2, π/2  
NA  
Lattice C/A Ratio
Not Available  
Not Available  
Mechanical Properties
Density
  
  
Density At Room Temperature
1.93 g/cm3  
99+
37.40 g/cm3  
2
Density When Liquid (at m.p.)
1.84 g/cm3  
99+
Not Available  
Tensile Strength
Not Available  
Not Available  
Viscosity
Not Available  
Not Available  
Vapor Pressure
  
  
Elasticity properties
  
  
Bulk Modulus
1.60 GPa  
99+
Not Available  
Young's Modulus
1.70 GPa  
99+
Not Available  
Poisson Ratio
Not Available  
Not Available  
Other Mechanical Properties
Ductile  
NA  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
1.87  
99+
Not Available  
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Electrical Properties
  
  
Electrical Property
Semiconductor  
Unknown  
Resistivity
205.00 nΩ·m  
17
Not Available  
Electrical Conductivity
0.05 106/cm Ω  
35
Not Available  
Electron Affinity
45.50 kJ/mol  
25
Not Available  
Thermal Properties
Specific Heat
0.24 J/(kg K)  
23
Not Available  
Molar Heat Capacity
32.21 J/mol·K  
4
Not Available  
Thermal Conductivity
35.90 W/m·K  
36
Not Available  
Critical Temperature
1,938.00 K  
5
Not Available  
Thermal Expansion
97.00 µm/(m·K)  
1
Not Available  
Enthalpy
  
  
Enthalpy of Vaporization
65.90 kJ/mol  
99+
Not Available  
Enthalpy of Fusion
2.10 kJ/mol  
99+
Not Available  
Enthalpy of Atomization
78.20 kJ/mol  
99+
Not Available  
Standard Molar Entropy
85.20 J/mol.K  
3
Not Available  
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