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Lawrencium vs Cesium

Lawrencium
Cesium
Cesium vs Lawrencium


Periodic Table
Symbol
Lr   
Cs   
Group Number
Not Available   
1   
17
Period Number
7   
6   
Block
d block   
s block   
Element Family
Actinide   
Alkali   
CAS Number
22537195   
15
7440462   
40
Space Group Name
Not Available   
Im_ 3m   
Space Group Number
Not Available   
229.00   
1
Facts
Interesting Facts
  • It is synthetically produced metal.
  • Radiation hazard can be produce by it.
  
Not Available   
Sources
Bombarding Californium-252 with Boron Nuclei, Found in Minerals, Mining   
Earth's crust, Found in Minerals, Mining, Ores of Minerals   
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory and Joint Institute for Nuclear Research   
Robert Bunsen and Gustav Kirchhoff   
Discovery
In 1961–1971   
In 1860   
Abundance
  
  
Abundance In Universe
Not Available   
8 * 10-8 %   
24
Abundance In Sun
~-9999 %   
~0.0000008 %   
20
Abundance In Meteorites
Not Available   
0.00 %   
38
Abundance In Earth's Crust
Not Available   
0.00 %   
35
Abundance In Oceans
Not Available   
0.00 %   
17
Abundance In Humans
Not Available   
0.00 %   
17
Uses
Uses & Benefits
  • Currently known uses of Lawrencium metal are limited to research purpose only.
  
  • 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
NA   
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry   
Medical Uses
NA   
NA   
Other Uses
NA   
Alloys   
Biological Properties
  
  
Toxicity
Unknown   
Mildly Toxic   
Present in Human Body
No   
Yes   
In Blood
0.00 Blood/mg dm-3   
37
0.00 Blood/mg dm-3   
28
In Bone
0.00 p.p.m.   
36
0.05 p.p.m.   
26
Physical Properties
Melting Point
1,627.00 °C   
20
28.50 °C   
99+
Boiling Point
Not Available   
678.40 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silver   
Silvery Gold   
Luster
Unknown Luster   
NA   
Hardness
  
  
Mohs Hardness
Not Available   
0.20   
25
Brinell Hardness
Not Available   
0.14 MPa   
99+
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
Lr   
Cs   
Isotopes
  
  
Known Isotopes
10   
28
36   
3
Electronegativity
  
  
Pauling Electronegativity
Not Available   
0.79   
99+
Sanderson Electronegativity
Not Available   
0.22   
33
Allred Rochow Electronegativity
Not Available   
0.86   
99+
Mulliken-Jaffe Electronegativity
Not Available   
0.62   
26
Allen Electronegativity
Not Available   
0.66   
99+
Electropositivity
  
  
Pauling Electropositivity
Not Available   
3.21   
2
Ionization Energies
  
  
1st Energy Level
470.00 kJ/mol   
99+
375.70 kJ/mol   
99+
2nd Energy Level
1,428.00 kJ/mol   
99+
2,234.30 kJ/mol   
8
3rd Energy Level
2,228.00 kJ/mol   
99+
3,400.00 kJ/mol   
16
4th Energy Level
4,910.00 kJ/mol   
21
Not Available   
Electrochemical Equivalent
3.23 g/amp-hr   
11
4.96 g/amp-hr   
3
Electron Work Function
Not Available   
2.14 eV   
99+
Other Chemical Properties
Ionization, Radioactive Isotopes   
Chemical Stability, Corrosion, Ionization, Radioactive Isotopes, Solubility   
Atomic Properties
Atomic Number
103   
15
55   
99+
Electron Configuration
[Rn] 5f14 7s2 7p1   
[Xe] 6s1   
Crystal Structure
Hexagonal Close Packed (HCP)   
Body Centered Cubic (BCC)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
103   
15
55   
99+
Number of Neutrons
157   
7
78   
99+
Number of Electrons
103   
15
55   
99+
Radius of an Atom
  
  
Atomic Radius
Not Available   
265.00 pm   
1
Covalent Radius
Not Available   
244.00 pm   
2
Van der Waals Radius
246.00 pm   
8
343.00 pm   
2
Atomic Weight
266.00 amu   
12
132.91 amu   
99+
Atomic Volume
Not Available   
71.07 cm3/mol   
1
Adjacent Atomic Numbers
  
  
Previous Element
Nobelium
  
Tin
  
Next Element
Rutherfordium
  
Barium
  
Valence Electron Potential
Not Available   
8.62 (-eV)   
99+
Lattice Constant
Not Available   
614.10 pm   
5
Lattice Angles
NA   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
Not Available   
1.93 g/cm3   
99+
Density When Liquid (at m.p.)
Not Available   
1.84 g/cm3   
99+
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Elasticity properties
  
  
Bulk Modulus
Not Available   
1.60 GPa   
99+
Young's Modulus
Not Available   
1.70 GPa   
99+
Poisson Ratio
0.32   
12
Not Available   
Other Mechanical Properties
Unknown   
Ductile   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
Not Available   
1.87   
99+
Magnetic Ordering
Unknown   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Unknown   
Semiconductor   
Resistivity
Not Available   
205.00 nΩ·m   
17
Electrical Conductivity
Not Available   
0.05 106/cm Ω   
35
Electron Affinity
Not Available   
45.50 kJ/mol   
25
Thermal Properties
Specific Heat
Not Available   
0.24 J/(kg K)   
23
Molar Heat Capacity
Not Available   
32.21 J/mol·K   
4
Thermal Conductivity
Not Available   
35.90 W/m·K   
36
Critical Temperature
Not Available   
1,938.00 K   
5
Thermal Expansion
Not Available   
97.00 µm/(m·K)   
1
Enthalpy
  
  
Enthalpy of Vaporization
Not Available   
65.90 kJ/mol   
99+
Enthalpy of Fusion
Not Available   
2.10 kJ/mol   
99+
Enthalpy of Atomization
Not Available   
78.20 kJ/mol   
99+
Standard Molar Entropy
Not Available   
85.20 J/mol.K   
3
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