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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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