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Properties of Cesium and Francium

Cesium
Francium
Properties of Francium & Cesium


Physical Properties
Melting Point
28.50 °C   
99+
27.00 °C   
99+
Boiling Point
678.40 °C   
99+
677.00 °C   
99+
Hardness
  
  
Mohs Hardness
0.20   
25
Not Available   
Brinell Hardness
0.14 MPa   
99+
Not Available   
Vickers Hardness
Not Available   
Not Available   
Optical Properties
  
  
Refractive Index
Not Available   
Not Available   
Reflectivity
Not Available   
Not Available   
Speed of Sound
Not Available   
Not Available   
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   
Fr   
Isotopes
  
  
Known Isotopes
36   
3
33   
6
Electronegativity
  
  
Pauling Electronegativity
0.79   
99+
0.70   
99+
Sanderson Electronegativity
0.22   
33
Not Available   
Allred Rochow Electronegativity
0.86   
99+
0.86   
99+
Mulliken-Jaffe Electronegativity
0.62   
26
0.68   
25
Allen Electronegativity
0.66   
99+
0.67   
99+
Electropositivity
  
  
Pauling Electropositivity
3.21   
2
3.30   
1
Ionization Energies
  
  
1st Energy Level
375.70 kJ/mol   
99+
380.00 kJ/mol   
99+
2nd Energy Level
2,234.30 kJ/mol   
8
Not Available   
3rd Energy Level
3,400.00 kJ/mol   
16
Not Available   
Electrochemical Equivalent
4.96 g/amp-hr   
3
8.32 g/amp-hr   
1
Electron Work Function
2.14 eV   
99+
Not Available   
Other Chemical Properties
?
Stable metals are non radioactive metals and have zero valence electrons in the outer shell.Chemical Stability, 
?
Corrosion is a process which converts refined metals to their more stable forms, for example, its oxide and hydroxide. This process of metals getting corroded is a gradual destruction of metals by chemical reactions.Corrosion, 
?
Ionization is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons to form ions, often in conjunction with other chemical changes.Ionization, 
?
Radioactive metals emit particles and radiation from their nuclei. This process comes in the picture because their nuclei experience the intense conflict between two strong forces. This metal also have radioactive isotopes.Radioactive Isotopes, 
?
Solubility is a chemical property referring to the ability for a given substance, the solute, to dissolve in a solvent.Solubility   
?
Ionization is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons to form ions, often in conjunction with other chemical changes.Ionization, 
?
Radioactive metals emit particles and radiation from their nuclei. This process comes in the picture because their nuclei experience the intense conflict between two strong forces. This metal also have radioactive isotopes.Radioactive Isotopes, 
?
Radioactive metals emit particles and radiation from their nuclei. This process comes in the picture because their nuclei experience the intense conflict between two strong forces.Radioactivity, 
?
Solubility is a chemical property referring to the ability for a given substance, the solute, to dissolve in a solvent.Solubility   
Mechanical Properties
Density
  
  
Density At Room Temperature
1.93 g/cm3   
99+
1.87 g/cm3   
99+
Density When Liquid (at m.p.)
1.84 g/cm3   
99+
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available   
Not Available   
Vapor Pressure at 2000 K
Not Available   
Not Available   
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Elasticity properties
  
  
Shear Modulus
Not Available   
Not Available   
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
?
Ductility of metals defines their ability to deform under tensile stress; this is often characterized by the metals ability to be stretched into a wire.Ductile   
NA   
Periodic Table
Symbol
Cs   
Fr   
Group Number
1   
17
1   
17
Period Number
6   
7   
Block
?
The s-block is on the left side of the periodic table that includes elements from the first two columns, the alkali metals (group 1) and alkaline earth metals (group 2), plus helium.s block   
?
The s-block is on the left side of the periodic table that includes elements from the first two columns, the alkali metals (group 1) and alkaline earth metals (group 2), plus helium.s block   
Element Family
?
All alkali metals are placed under group number 1 and s-block of periodic table. These metals are highly reactive and are found in ores of other metals and minerals. Alkali metals can be easily distinguished from others as these metals have only 1 electronAlkali   
?
All alkali metals are placed under group number 1 and s-block of periodic table. These metals are highly reactive and are found in ores of other metals and minerals. Alkali metals can be easily distinguished from others as these metals have only 1 electronAlkali   
Atomic Properties
Atomic Number
55   
99+
87   
31
Atomic Weight
132.91 amu   
99+
223.00 amu   
27
Atomic Volume
71.07 cm3/mol   
1
Not Available   
Electron Configuration
[Xe] 6s1   
[Rn] 7s1   
Valence Electron Potential
8.62 (-eV)   
99+
8.00 (-eV)   
99+
Atom
  
  
Number of Protons
55   
99+
87   
31
Number of Neutrons
78   
99+
136   
17
Number of Electrons
55   
99+
87   
31
Crystal Structure
?
BCC is a basis type of cubic crystal structure. In crystallography, the cubic crystals structure is a crystal system where the unit cell has a cube shaped structure. This is one of the simplest crystal structure found in crystals of metal.Body Centered Cubic (BCC)   
?
BCC is a basis type of cubic crystal structure. In crystallography, the cubic crystals structure is a crystal system where the unit cell has a cube shaped structure. This is one of the simplest crystal structure found in crystals of metal.Body Centered Cubic (BCC)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Radius of an Atom
  
  
Atomic Radius
265.00 pm   
1
Not Available   
Covalent Radius
244.00 pm   
2
260.00 pm   
1
Van der Waals Radius
343.00 pm   
2
348.00 pm   
1
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   
Adjacent Atomic Numbers
  
  
Next Element
Barium
  
Radium
  
Previous Element
Tin
  
Polonium
  
Magnetic Properties
Electrical Properties
  
  
Resistivity
205.00 nΩ·m   
17
3.00 nΩ·m   
99+
Electrical Conductivity
0.05 106/cm Ω   
35
0.03 106/cm Ω   
40
Electron Affinity
45.50 kJ/mol   
25
Not Available   
Electrical Property
?
Semiconductor metals have conductivity between that of a conductor and an insulator.Semiconductor   
?
Poor conductor metals have moderate resistance to electric currents. They can conduct electric current through them with very low efficiency.Poor Conductor   
Magnetic Characteristics
  
  
Specific Gravity
1.87   
99+
Not Available   
Magnetic Ordering
?
Paramagnetic metals are slightly attracted by magnet, but they can’t retain the magnetic effect once they are removed from the magnetic field.Paramagnetic   
?
Paramagnetic metals are slightly attracted by magnet, but they can’t retain the magnetic effect once they are removed from the magnetic field.Paramagnetic   
Permeability
Not Available   
Not Available   
Susceptibility
Not Available   
Not Available   
Thermal Properties
Specific Heat
0.24 J/(kg K)   
23
Not Available   
Thermal Conductivity
35.90 W/m·K   
36
15.00 W/m·K   
99+
Critical Temperature
1,938.00 K   
5
Not Available   
Molar Heat Capacity
32.21 J/mol·K   
4
Not Available   
Thermal Expansion
97.00 µm/(m·K)   
1
Not Available   
Standard Molar Entropy
85.20 J/mol.K   
3
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+
71.00 kJ/mol   
99+
All >>
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