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Francium vs Radium

Francium
Radium
Radium vs Francium


Periodic Table
Symbol
Fr   
Ra   
Group Number
1   
17
2   
16
Period Number
7   
7   
Block
s block   
s block   
Element Family
Alkali   
Alkaline Earth   
CAS Number
7440735   
18
7440144   
99+
Space Group Name
Not Available   
Im_ 3m   
Space Group Number
Not Available   
229.00   
1
Facts
Interesting Facts
  • 223 Francium has the longest half life at 21.8.
  • Francium metal is produced by alpha decay in 227Actinium 227.
  
  • Radium metal is the heaviest metal of Alkaline earth metals column.
  • Radium metal is highly radioactive and does not have any stable isotopes.
  
Sources
Formed by Decay Process, Mining   
Mining, Ores of metals   
History
  
  
Who Discovered
Marguerite Perey   
Not Available   
Discovery
In 1939   
In 1898   
Abundance
  
  
Abundance In Earth's Crust
Not Available   
0.00 %   
99+
Abundance In Oceans
Not Available   
0.00 %   
99+
Abundance In Humans
Not Available   
0.00 %   
20
Uses
Uses & Benefits
  • Francium has no known uses as it has a half life of only 22 minutes.
  
  • It is a highly radioactive metal; and sometime Radium-223 is used to treat prostate cancer.
  • It is used in luminous paints.
  
Industrial Uses
NA   
NA   
Medical Uses
NA   
Pharmaceutical Industry   
Other Uses
NA   
NA   
Biological Properties
  
  
Toxicity
NA   
Highly Toxic   
Present in Human Body
No   
No   
In Blood
0.00 Blood/mg dm-3   
37
Not Available   
In Bone
0.00 p.p.m.   
36
Not Available   
Physical Properties
Melting Point
27.00 °C   
99+
700.00 °C   
99+
Boiling Point
677.00 °C   
99+
1,737.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
NA   
Silvery White   
Luster
NA   
Metallic   
Hardness
  
  
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
Fr   
Ra   
Isotopes
  
  
Known Isotopes
33   
6
33   
6
Electronegativity
  
  
Pauling Electronegativity
0.70   
99+
0.90   
99+
Allred Rochow Electronegativity
0.86   
99+
0.97   
38
Mulliken-Jaffe Electronegativity
0.68   
25
0.92   
20
Allen Electronegativity
0.67   
99+
0.89   
99+
Electropositivity
  
  
Pauling Electropositivity
3.30   
1
3.10   
5
Ionization Energies
  
  
1st Energy Level
380.00 kJ/mol   
99+
509.30 kJ/mol   
99+
2nd Energy Level
Not Available   
979.00 kJ/mol   
99+
Electrochemical Equivalent
8.32 g/amp-hr   
1
4.22 g/amp-hr   
6
Electron Work Function
Not Available   
Not Available   
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Ionization, Radioactive Isotopes, Radioactivity   
Atomic Properties
Atomic Number
87   
31
88   
30
Electron Configuration
[Rn] 7s1   
[Rn] 7s2   
Crystal Structure
Body Centered Cubic (BCC)   
Body Centered Cubic (BCC)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
87   
31
88   
30
Number of Neutrons
136   
17
138   
16
Number of Electrons
87   
31
88   
30
Radius of an Atom
  
  
Covalent Radius
260.00 pm   
1
221.00 pm   
3
Van der Waals Radius
348.00 pm   
1
283.00 pm   
4
Atomic Weight
223.00 amu   
27
226.00 amu   
26
Atomic Volume
Not Available   
45.20 cm3/mol   
4
Adjacent Atomic Numbers
  
  
Previous Element
Polonium
  
Francium
  
Next Element
Radium
  
Actinium
  
Valence Electron Potential
8.00 (-eV)   
99+
20.10 (-eV)   
99+
Lattice Constant
Not Available   
514.80 pm   
13
Lattice Angles
NA   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
1.87 g/cm3   
99+
5.50 g/cm3   
99+
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Elasticity properties
  
  
Poisson Ratio
Not Available   
Not Available   
Other Mechanical Properties
NA   
NA   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
Not Available   
5.00   
99+
Magnetic Ordering
Paramagnetic   
Nonmagnetic   
Electrical Properties
  
  
Electrical Property
Poor Conductor   
NA   
Resistivity
3.00 nΩ·m   
99+
100.00 nΩ·m   
31
Electrical Conductivity
0.03 106/cm Ω   
40
Not Available   
Thermal Properties
Specific Heat
Not Available   
0.12 J/(kg K)   
40
Molar Heat Capacity
Not Available   
Not Available   
Thermal Conductivity
15.00 W/m·K   
99+
18.60 W/m·K   
99+
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
Not Available   
Not Available   
Enthalpy
  
  
Enthalpy of Atomization
71.00 kJ/mol   
99+
163.00 kJ/mol   
99+
Standard Molar Entropy
Not Available   
71.00 J/mol.K   
14
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