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Technetium vs Bismuth

Technetium
Bismuth
Bismuth vs Technetium


Periodic Table
Symbol
Tc   
Bi   
Group Number
7   
11
15   
3
Period Number
5   
6   
Block
d block   
p block   
Element Family
Transition Metal   
Post-​Transition   
CAS Number
7440268   
99+
7440699   
22
Space Group Name
P63/mmc   
C12/m1   
Space Group Number
194.00   
5
12.00   
12
Facts
Interesting Facts
  • Original name of Technetium was Masurium.
  • At the time of its discovery it found in sample of Molybdenum.
  
  • Bismuth metal is soluble and reacts with concentrated nitric acid.
  • It oxides are used as a yellow pigment in paint. Bismuth chloride oxide BiClO gives a pearly texture to cosmetics.
  
Sources
Made by Bombarding Molybdenum with Deuterons   
Found in Minerals, Mining, Ores of Minerals   
History
  
  
Who Discovered
Emilio Segrè and Carlo Perriero   
Claude François Geoffroy   
Discovery
In 1937   
In 1753   
Abundance
  
  
Abundance In Universe
Not Available   
7 * 10-8 %   
25
Abundance In Sun
~-9999 %   
~0.000006 %   
14
Abundance In Meteorites
Not Available   
0.00 %   
99+
Abundance In Earth's Crust
Not Available   
0.00 %   
99+
Abundance In Oceans
Not Available   
0.00 %   
24
Uses
Uses & Benefits
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  
  • Tin and bismuth alloys have a very low melting point and hence it is used in fire detector and the fire extinguishers. It also used in electric solders and fuses.
  
Industrial Uses
NA   
Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry   
Medical Uses
NA   
Pharmaceutical Industry   
Other Uses
Alloys, Nuclear Research, Research Purposes   
Alloys   
Biological Properties
  
  
Toxicity
Low Toxic   
Low Toxic   
Present in Human Body
No   
Yes   
In Blood
0.00 Blood/mg dm-3   
37
0.02 Blood/mg dm-3   
20
In Bone
0.00 p.p.m.   
36
0.20 p.p.m.   
22
Physical Properties
Melting Point
2,200.00 °C   
9
271.30 °C   
99+
Boiling Point
4,877.00 °C   
7
1,560.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Shiny Gray   
Silver   
Luster
NA   
Metallic   
Hardness
  
  
Mohs Hardness
Not Available   
2.25   
15
Brinell Hardness
Not Available   
70.00 MPa   
99+
Speed of Sound
16,200.00 m/s   
1
1,790.00 m/s   
99+
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
Tc   
Bi   
Isotopes
  
  
Known Isotopes
18   
21
33   
6
Electronegativity
  
  
Pauling Electronegativity
1.90   
11
2.02   
6
Sanderson Electronegativity
Not Available   
2.34   
3
Allred Rochow Electronegativity
1.36   
20
1.67   
6
Mulliken-Jaffe Electronegativity
Not Available   
2.15   
4
Allen Electronegativity
1.51   
28
2.01   
4
Electropositivity
  
  
Pauling Electropositivity
2.10   
99+
1.98   
99+
Ionization Energies
  
  
1st Energy Level
702.00 kJ/mol   
36
703.00 kJ/mol   
35
2nd Energy Level
1,470.00 kJ/mol   
99+
1,610.00 kJ/mol   
33
3rd Energy Level
2,850.00 kJ/mol   
33
2,466.00 kJ/mol   
99+
4th Energy Level
Not Available   
4,370.00 kJ/mol   
28
5th Energy Level
Not Available   
5,400.00 kJ/mol   
30
6th Energy Level
Not Available   
8,520.00 kJ/mol   
19
Electrochemical Equivalent
0.52 g/amp-hr   
99+
2.60 g/amp-hr   
19
Electron Work Function
Not Available   
4.22 eV   
22
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Ionization, Radioactive Isotopes, Solubility   
Atomic Properties
Atomic Number
43   
99+
83   
33
Electron Configuration
[Kr] 4d5 5s2   
[Xe] 4f14 5d10 6s2 6p3   
Crystal Structure
Hexagonal Close Packed (HCP)   
Rhombohedral (RHO)   
Crystal Lattice
HCP-Crystal-Structure-of-Technetium.jpg#100   
RHO-Crystal-Structure-of-Bismuth.jpg#100   
Atom
  
  
Number of Protons
43   
99+
83   
33
Number of Neutrons
55   
99+
126   
18
Number of Electrons
43   
99+
83   
33
Radius of an Atom
  
  
Atomic Radius
136.00 pm   
99+
156.00 pm   
29
Covalent Radius
147.00 pm   
37
148.00 pm   
36
Van der Waals Radius
200.00 pm   
28
207.00 pm   
26
Atomic Weight
98.00 amu   
99+
208.98 amu   
29
Atomic Volume
8.50 cm3/mol   
99+
21.30 cm3/mol   
14
Adjacent Atomic Numbers
  
  
Previous Element
Molybdenum
  
Lead
  
Next Element
Ruthenium
  
Polonium
  
Valence Electron Potential
180.00 (-eV)   
3
41.90 (-eV)   
99+
Lattice Constant
273.50 pm   
99+
667.40 pm   
2
Lattice Angles
π/2, π/2, 2 π/3   
NA   
Lattice C/A Ratio
1.60   
5
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
11.00 g/cm3   
34
9.78 g/cm3   
39
Density When Liquid (at m.p.)
Not Available   
10.05 g/cm3   
18
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Elasticity properties
  
  
Shear Modulus
Not Available   
12.00 GPa   
99+
Bulk Modulus
Not Available   
31.00 GPa   
38
Young's Modulus
Not Available   
32.00 GPa   
99+
Poisson Ratio
Not Available   
0.33   
11
Other Mechanical Properties
NA   
NA   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
11.50   
24
9.79   
30
Magnetic Ordering
Paramagnetic   
Diamagnetic   
Permeability
Not Available   
0.00 H/m   
6
Susceptibility
Not Available   
0.00   
6
Electrical Properties
  
  
Electrical Property
Conductor   
Semiconductor   
Resistivity
200.00 nΩ·m   
18
1.29 nΩ·m   
99+
Electrical Conductivity
0.07 106/cm Ω   
30
0.01 106/cm Ω   
99+
Electron Affinity
53.00 kJ/mol   
18
91.20 kJ/mol   
11
Thermal Properties
Specific Heat
0.21 J/(kg K)   
29
0.12 J/(kg K)   
40
Molar Heat Capacity
24.27 J/mol·K   
99+
25.52 J/mol·K   
37
Thermal Conductivity
50.60 W/m·K   
30
7.97 W/m·K   
99+
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
7.10 µm/(m·K)   
99+
13.40 µm/(m·K)   
28
Enthalpy
  
  
Enthalpy of Vaporization
660.00 kJ/mol   
6
151.00 kJ/mol   
99+
Enthalpy of Fusion
23.01 kJ/mol   
9
10.90 kJ/mol   
33
Enthalpy of Atomization
649.00 kJ/mol   
8
207.10 kJ/mol   
99+
Standard Molar Entropy
181.10 J/mol.K   
2
56.70 J/mol.K   
24
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