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Francium Seaborgium Comparison

Francium
Seaborgium
Seaborgium Francium comparison


Periodic Table
Symbol
Fr  
Sg  
Group Number
1  
17
6  
12
Period Number
7  
7  
Block
s block  
d block  
Element Family
Alkali  
Transition Metal  
CAS Number
7440735  
18
54038812  
9
Space Group Name
-  
-  
Space Group Number
225.00  
3
166.00  
9
Facts
Interesting Facts
  • 223 Francium has the longest half life at 21.8.
  • Francium metal is produced by alpha decay in 227Actinium 227.
  
  • Seaborgium most stable isotope is Sg and it has 2.1 min of half- life.
  • And other isotopes of Seaborgium have half-lives as short as 3 ms.
  
Sources
Formed by Decay Process, Mining  
Synthetically Produced  
History
  
  
Who Discovered
Marguerite Perey  
Lawrence Berkeley National Laboratory  
Discovery
In 1939  
In 1974  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
40
Abundance In Sun
0.00 %  
30
-  
Abundance In Meteorites
0.00 %  
99+
-  
Abundance In Earth's Crust
0.00 %  
99+
-  
Abundance In Oceans
-  
-  
Abundance In Humans
0.00 %  
24
-  
Uses
Uses & Benefits
  • Francium has no known uses as it has a half life of only 22 minutes.
  
  • Currently known uses of Seaborgium metal are limited to research purpose only.
  
Industrial Uses
-  
-  
Medical Uses
-  
-  
Other Uses
-  
Research Purposes  
Biological Properties
  
  
Toxicity
-  
-  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
27
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
27.00 °C  
99+
-  
Boiling Point
677.00 °C  
99+
0.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
-  
-  
Luster
-  
Unknown Luster  
Hardness
  
  
Mohs Hardness
0.20  
27
6.00  
6
Brinell Hardness
119.00 MPa  
99+
400.00 MPa  
34
Vickers Hardness
300.00 MPa  
99+
520.00 MPa  
33
Speed of Sound
2,440.00 m/s  
99+
3,200.00 m/s  
35
Optical Properties
  
  
Refractive Index
1.70  
27
1.30  
99+
Reflectivity
72.00 %  
11
68.00 %  
15
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Fr  
Sg  
Isotopes
  
  
Known Isotopes
33  
6
9  
29
Electronegativity
  
  
Pauling Electronegativity
0.70  
99+
0.00  
99+
Sanderson Electronegativity
0.70  
99+
1.90  
13
Allred Rochow Electronegativity
0.86  
99+
1.30  
25
Mulliken-Jaffe Electronegativity
0.68  
99+
1.30  
33
Allen Electronegativity
0.67  
99+
1.90  
8
Electropositivity
  
  
Pauling Electropositivity
3.30  
1
2.20  
39
Ionization Energies
  
  
1st Energy Level
380.00 kJ/mol  
99+
757.40 kJ/mol  
21
2nd Energy Level
392.80 kJ/mol  
99+
1,732.90 kJ/mol  
29
3rd Energy Level
392.80 kJ/mol  
99+
2,483.50 kJ/mol  
99+
4th Energy Level
392.80 kJ/mol  
99+
3,415.60 kJ/mol  
99+
5th Energy Level
392.00 kJ/mol  
99+
4,561.80 kJ/mol  
99+
6th Energy Level
3,920.00 kJ/mol  
99+
5,715.80 kJ/mol  
99+
7th Energy level
3,920.00 kJ/mol  
99+
5,700.00 kJ/mol  
99+
8th Energy Level
3,920.00 kJ/mol  
99+
5,700.00 kJ/mol  
99+
9th Energy Level
3,920.00 kJ/mol  
99+
5,710.00 kJ/mol  
99+
10th Energy Level
392.00 kJ/mol  
99+
6,270.00 kJ/mol  
99+
11th Energy Level
392.00 kJ/mol  
99+
6,600.00 kJ/mol  
39
12th Energy Level
38,000.00 kJ/mol  
23
971.00 kJ/mol  
99+
13th Energy Level
3,920.00 kJ/mol  
99+
5,700.00 kJ/mol  
99+
14th Energy Level
380.00 kJ/mol  
99+
5,700.00 kJ/mol  
99+
15th Energy Level
67,700.00 kJ/mol  
32
54,000.00 kJ/mol  
99+
16th Energy Level
39,200.00 kJ/mol  
99+
64,000.00 kJ/mol  
27
17th Energy Level
392.00 kJ/mol  
99+
579.80 kJ/mol  
99+
18th Energy Level
3,920.00 kJ/mol  
99+
3,300.00 kJ/mol  
99+
19th Energy Level
392.80 kJ/mol  
99+
579.80 kJ/mol  
99+
20th Energy Level
392.00 kJ/mol  
99+
579.00 kJ/mol  
99+
21st Energy Level
392.00 kJ/mol  
99+
6,270.00 kJ/mol  
14
22nd Energy Level
392.00 kJ/mol  
99+
573.00 kJ/mol  
99+
23rd Energy Level
392.80 kJ/mol  
99+
5,790.00 kJ/mol  
22
24th Energy Level
392.00 kJ/mol  
99+
971.00 kJ/mol  
4
25th Energy Level
392.00 kJ/mol  
99+
0.00 kJ/mol  
99+
26th Energy Level
392.80 kJ/mol  
99+
579.10 kJ/mol  
99+
27th Energy Level
392.00 kJ/mol  
99+
870.00 kJ/mol  
7
28th Energy Level
380.00 kJ/mol  
99+
870.00 kJ/mol  
10
29th Energy Level
392.00 kJ/mol  
99+
761.90 kJ/mol  
21
30th Energy Level
677.00 kJ/mol  
31
0.00 kJ/mol  
99+
Electrochemical Equivalent
8.32 g/amp-hr  
1
3.20 g/amp-hr  
14
Electron Work Function
4.07 eV  
33
6.00 eV  
1
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
-  
Atomic
Atomic Number
87  
31
106  
12
Electron Configuration
[Rn] 7s1  
[Rn] 5f14 6d2 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
106  
12
Number of Neutrons
136  
18
157  
8
Number of Electrons
87  
31
106  
12
Radius of an Atom
  
  
Atomic Radius
348.00 pm  
1
132.00 pm  
99+
Covalent Radius
260.00 pm  
1
143.00 pm  
99+
Van der Waals Radius
348.00 pm  
1
230.00 pm  
24
Atomic Weight
223.00 amu  
27
269.00 amu  
9
Atomic Volume
71.00 cm3/mol  
2
35.00 cm3/mol  
8
Adjacent Atomic Numbers
  
  
Previous Element
Polonium
  
Dubnium
  
Next Element
Radium
  
Bohrium
  
Valence Electron Potential
8.00 (-eV)  
99+
6.10 (-eV)  
99+
Lattice Constant
440.00 pm  
21
-  
Lattice Angles
-  
-  
Lattice C/A Ratio
1.56  
99+
1.36  
99+
Mechanical
Density
  
  
Density At Room Temperature
1.87 g/cm3  
99+
35.00 g/cm3  
4
Density When Liquid (at m.p.)
1.87 g/cm3  
99+
35.00 g/cm3  
4
Tensile Strength
50.00 MPa  
38
30.00 MPa  
99+
Viscosity
0.00  
25
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
24
0.00 (Pa)  
99+
Elasticity properties
  
  
Shear Modulus
3.60 GPa  
99+
30.00 GPa  
27
Bulk Modulus
6.00 GPa  
99+
0.00 GPa  
99+
Young's Modulus
0.00 GPa  
99+
12.60 GPa  
99+
Poisson Ratio
0.44  
3
0.25  
24
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
0.87  
99+
35.00  
6
Magnetic Ordering
Paramagnetic  
-  
Permeability
0.00 H/m  
13
0.00 H/m  
7
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
Poor Conductor  
-  
Resistivity
3.00 nΩ·m  
99+
0.38 nΩ·m  
99+
Electrical Conductivity
0.03 106/cm Ω  
99+
0.00 106/cm Ω  
99+
Electron Affinity
0.70 kJ/mol  
99+
50.00 kJ/mol  
26
Thermal
Specific Heat
0.15 J/(kg K)  
37
0.27 J/(kg K)  
19
Molar Heat Capacity
27.00 J/mol·K  
29
35.00 J/mol·K  
5
Thermal Conductivity
15.00 W/m·K  
99+
0.14 W/m·K  
99+
Critical Temperature
300.00 K  
99+
1,200.00 K  
99+
Thermal Expansion
18.90 µm/(m·K)  
25
11.00 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
67.00 kJ/mol  
99+
585.00 kJ/mol  
10
Enthalpy of Fusion
2.30 kJ/mol  
99+
-  
Enthalpy of Atomization
71.00 kJ/mol  
99+
650.00 kJ/mol  
8
Standard Molar Entropy
42.00 J/mol.K  
99+
42.70 J/mol.K  
99+
Summary >>
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