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Francium vs Technetium

Francium
Technetium
Technetium vs Francium


Periodic Table
Symbol
Fr   
Tc   
Group Number
1   
17
7   
11
Period Number
7   
5   
Block
s block   
d block   
Element Family
Alkali   
Transition Metal   
CAS Number
7440735   
18
7440268   
99+
Space Group Name
Not Available   
P63/mmc   
Space Group Number
Not Available   
194.00   
5
Facts
Interesting Facts
  • 223 Francium has the longest half life at 21.8.
  • Francium metal is produced by alpha decay in 227Actinium 227.
  
  • Original name of Technetium was Masurium.
  • At the time of its discovery it found in sample of Molybdenum.
  
Sources
Formed by Decay Process, Mining   
Made by Bombarding Molybdenum with Deuterons   
History
  
  
Who Discovered
Marguerite Perey   
Emilio Segrè and Carlo Perriero   
Discovery
In 1939   
In 1937   
Abundance
  
  
Uses
Uses & Benefits
  • Francium has no known uses as it has a half life of only 22 minutes.
  
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  
Industrial Uses
NA   
NA   
Medical Uses
NA   
NA   
Other Uses
NA   
Alloys, Nuclear Research, Research Purposes   
Biological Properties
  
  
Toxicity
NA   
Low Toxic   
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
27.00 °C   
99+
2,200.00 °C   
9
Boiling Point
677.00 °C   
99+
4,877.00 °C   
7
Appearance
  
  
Physical State
Solid   
Solid   
Color
NA   
Shiny Gray   
Luster
NA   
NA   
Hardness
  
  
Speed of Sound
Not Available   
16,200.00 m/s   
1
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   
Tc   
Isotopes
  
  
Known Isotopes
33   
6
18   
21
Electronegativity
  
  
Pauling Electronegativity
0.70   
99+
1.90   
11
Allred Rochow Electronegativity
0.86   
99+
1.36   
20
Mulliken-Jaffe Electronegativity
0.68   
25
Not Available   
Allen Electronegativity
0.67   
99+
1.51   
28
Electropositivity
  
  
Pauling Electropositivity
3.30   
1
2.10   
99+
Ionization Energies
  
  
1st Energy Level
380.00 kJ/mol   
99+
702.00 kJ/mol   
36
2nd Energy Level
Not Available   
1,470.00 kJ/mol   
99+
3rd Energy Level
Not Available   
2,850.00 kJ/mol   
33
Electrochemical Equivalent
8.32 g/amp-hr   
1
0.52 g/amp-hr   
99+
Electron Work Function
Not Available   
Not Available   
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Atomic Properties
Atomic Number
87   
31
43   
99+
Electron Configuration
[Rn] 7s1   
[Kr] 4d5 5s2   
Crystal Structure
Body Centered Cubic (BCC)   
Hexagonal Close Packed (HCP)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
HCP-Crystal-Structure-of-Technetium.jpg#100   
Atom
  
  
Number of Protons
87   
31
43   
99+
Number of Neutrons
136   
17
55   
99+
Number of Electrons
87   
31
43   
99+
Radius of an Atom
  
  
Atomic Radius
Not Available   
136.00 pm   
99+
Covalent Radius
260.00 pm   
1
147.00 pm   
37
Van der Waals Radius
348.00 pm   
1
200.00 pm   
28
Atomic Weight
223.00 amu   
27
98.00 amu   
99+
Atomic Volume
Not Available   
8.50 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Polonium
  
Molybdenum
  
Next Element
Radium
  
Ruthenium
  
Valence Electron Potential
8.00 (-eV)   
99+
180.00 (-eV)   
3
Lattice Constant
Not Available   
273.50 pm   
99+
Lattice Angles
NA   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
1.60   
5
Mechanical Properties
Density
  
  
Density At Room Temperature
1.87 g/cm3   
99+
11.00 g/cm3   
34
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   
11.50   
24
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Poor Conductor   
Conductor   
Resistivity
3.00 nΩ·m   
99+
200.00 nΩ·m   
18
Electrical Conductivity
0.03 106/cm Ω   
40
0.07 106/cm Ω   
30
Electron Affinity
Not Available   
53.00 kJ/mol   
18
Thermal Properties
Specific Heat
Not Available   
0.21 J/(kg K)   
29
Molar Heat Capacity
Not Available   
24.27 J/mol·K   
99+
Thermal Conductivity
15.00 W/m·K   
99+
50.60 W/m·K   
30
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
Not Available   
7.10 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
Not Available   
660.00 kJ/mol   
6
Enthalpy of Fusion
Not Available   
23.01 kJ/mol   
9
Enthalpy of Atomization
71.00 kJ/mol   
99+
649.00 kJ/mol   
8
Standard Molar Entropy
Not Available   
181.10 J/mol.K   
2
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