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Actinium vs Francium

Actinium
Francium
Francium vs Actinium


Periodic Table
Symbol
Ac   
Fr   
Group Number
Not Available   
1   
17
Period Number
7   
7   
Block
f block   
s block   
Element Family
Actinide   
Alkali   
CAS Number
7440348   
99+
7440735   
18
Space Group Name
Fm_ 3m   
Not Available   
Space Group Number
225.00   
2
Not Available   
Facts
Interesting Facts
Not Available   
  • 223 Francium has the longest half life at 21.8.
  • Francium metal is produced by alpha decay in 227Actinium 227.
  
Sources
Obtained by Treating Radium with Neutrons, Ores of metals   
Formed by Decay Process, Mining   
History
  
  
Who Discovered
Friedrich Oskar Giesel   
Marguerite Perey   
Discovery
In 1902   
In 1939   
Abundance
  
  
Uses
Uses & Benefits
  • Actinium metal has a great source of alpha rays but it is hardly used outside research purpose.
  
  • Francium has no known uses as it has a half life of only 22 minutes.
  
Industrial Uses
NA   
NA   
Medical Uses
NA   
NA   
Other Uses
Alloys, Nuclear Research, Research Purposes   
NA   
Biological Properties
  
  
Toxicity
Toxic   
NA   
Present in Human Body
No   
No   
In Blood
0.00 Blood/mg dm-3   
37
0.00 Blood/mg dm-3   
37
In Bone
0.00 p.p.m.   
36
0.00 p.p.m.   
36
Physical Properties
Melting Point
1,227.00 °C   
38
27.00 °C   
99+
Boiling Point
3,200.00 °C   
26
677.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
NA   
Luster
NA   
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
Ac   
Fr   
Isotopes
  
  
Known Isotopes
29   
10
33   
6
Electronegativity
  
  
Pauling Electronegativity
1.10   
99+
0.70   
99+
Allred Rochow Electronegativity
1.00   
36
0.86   
99+
Mulliken-Jaffe Electronegativity
Not Available   
0.68   
25
Allen Electronegativity
Not Available   
0.67   
99+
Electropositivity
  
  
Pauling Electropositivity
2.90   
10
3.30   
1
Ionization Energies
  
  
1st Energy Level
499.00 kJ/mol   
99+
380.00 kJ/mol   
99+
2nd Energy Level
1,170.00 kJ/mol   
99+
Not Available   
3rd Energy Level
1,900.00 kJ/mol   
99+
Not Available   
4th Energy Level
4,700.00 kJ/mol   
23
Not Available   
Electrochemical Equivalent
2.82 g/amp-hr   
18
8.32 g/amp-hr   
1
Electron Work Function
Not Available   
Not Available   
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Atomic Properties
Atomic Number
89   
29
87   
31
Electron Configuration
[Rn] 6d1 7s2   
[Rn] 7s1   
Crystal Structure
Face Centered Cubic (FCC)   
Body Centered Cubic (BCC)   
Crystal Lattice
FCC-Crystal-Structure-of-Actinium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
89   
29
87   
31
Number of Neutrons
138   
16
136   
17
Number of Electrons
89   
29
87   
31
Radius of an Atom
  
  
Atomic Radius
195.00 pm   
7
Not Available   
Covalent Radius
Not Available   
260.00 pm   
1
Van der Waals Radius
Not Available   
348.00 pm   
1
Atomic Weight
227.00 amu   
25
223.00 amu   
27
Atomic Volume
22.54 cm3/mol   
11
Not Available   
Adjacent Atomic Numbers
  
  
Previous Element
Radium
  
Polonium
  
Next Element
Thorium
  
Radium
  
Valence Electron Potential
38.60 (-eV)   
99+
8.00 (-eV)   
99+
Lattice Constant
567.00 pm   
8
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
10.00 g/cm3   
37
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
10.07   
28
Not Available   
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Unknown   
Poor Conductor   
Resistivity
Not Available   
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
27.20 J/mol·K   
18
Not Available   
Thermal Conductivity
12.00 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
301.00 kJ/mol   
36
71.00 kJ/mol   
99+
Standard Molar Entropy
56.50 J/mol.K   
25
Not Available   
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