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Radium vs Francium

Radium
Francium
Francium vs Radium


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