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Technetium Bismuth Comparison

Technetium
Bismuth
Bismuth Technetium comparison


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  
7
12.00  
15
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
0.00 %  
40
0.00 %  
26
Abundance In Sun
0.00 %  
18
0.00 %  
14
Abundance In Meteorites
-  
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
99+
Abundance In Oceans
-  
0.00 %  
24
Abundance In Humans
-  
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
-  
Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
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  
40
0.02 Blood/mg dm-3  
20
In Bone
0.00 p.p.m.  
99+
0.20 p.p.m.  
27
Physical
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
-  
Metallic  
Hardness
  
  
Mohs Hardness
2.25  
16
2.25  
16
Brinell Hardness
550.00 MPa  
27
70.00 MPa  
99+
Vickers Hardness
500.00 MPa  
35
30.00 MPa  
99+
Speed of Sound
16,200.00 m/s  
1
1,790.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.90  
18
2.50  
5
Reflectivity
35.00 %  
34
70.00 %  
13
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Tc  
Bi  
Isotopes
  
  
Known Isotopes
18  
21
33  
6
Electronegativity
  
  
Pauling Electronegativity
1.90  
12
2.02  
7
Sanderson Electronegativity
1.90  
13
2.34  
3
Allred Rochow Electronegativity
1.36  
21
1.67  
7
Mulliken-Jaffe Electronegativity
1.90  
13
2.15  
8
Allen Electronegativity
1.51  
31
2.01  
5
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  
34
3rd Energy Level
2,850.00 kJ/mol  
34
2,466.00 kJ/mol  
99+
4th Energy Level
7,020.00 kJ/mol  
14
4,370.00 kJ/mol  
38
5th Energy Level
7,020.00 kJ/mol  
28
5,400.00 kJ/mol  
99+
6th Energy Level
7,020.00 kJ/mol  
99+
8,520.00 kJ/mol  
29
7th Energy level
4,700.00 kJ/mol  
99+
7,030.00 kJ/mol  
99+
8th Energy Level
4,700.00 kJ/mol  
99+
7,030.00 kJ/mol  
37
9th Energy Level
7,020.00 kJ/mol  
35
7,030.00 kJ/mol  
34
10th Energy Level
7,020.00 kJ/mol  
39
7,030.00 kJ/mol  
38
11th Energy Level
7,020.00 kJ/mol  
37
7,030.00 kJ/mol  
36
12th Energy Level
7,020.00 kJ/mol  
99+
7,030.00 kJ/mol  
99+
13th Energy Level
7,020.00 kJ/mol  
33
7,030.00 kJ/mol  
32
14th Energy Level
7,020.00 kJ/mol  
23
7,030.00 kJ/mol  
22
15th Energy Level
70,200.00 kJ/mol  
29
70,300.00 kJ/mol  
28
16th Energy Level
70,200.00 kJ/mol  
24
70,300.00 kJ/mol  
23
17th Energy Level
702.50 kJ/mol  
99+
703.00 kJ/mol  
99+
18th Energy Level
7,020.00 kJ/mol  
35
7,030.00 kJ/mol  
34
19th Energy Level
702.00 kJ/mol  
99+
703.00 kJ/mol  
40
20th Energy Level
702.00 kJ/mol  
35
703.00 kJ/mol  
34
21st Energy Level
702.00 kJ/mol  
99+
7,030.00 kJ/mol  
12
22nd Energy Level
702.00 kJ/mol  
29
703.00 kJ/mol  
28
23rd Energy Level
702.00 kJ/mol  
99+
7,030.00 kJ/mol  
10
24th Energy Level
702.50 kJ/mol  
28
703.00 kJ/mol  
27
25th Energy Level
702.00 kJ/mol  
30
703.00 kJ/mol  
29
26th Energy Level
702.00 kJ/mol  
29
703.00 kJ/mol  
28
27th Energy Level
702.00 kJ/mol  
30
703.00 kJ/mol  
29
28th Energy Level
702.00 kJ/mol  
35
703.00 kJ/mol  
34
29th Energy Level
702.00 kJ/mol  
36
703.00 kJ/mol  
35
30th Energy Level
702.00 kJ/mol  
30
703.00 kJ/mol  
29
Electrochemical Equivalent
0.52 g/amp-hr  
99+
2.60 g/amp-hr  
23
Electron Work Function
4.90 eV  
12
4.22 eV  
29
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Ionization, Radioactive Isotopes, Solubility  
Atomic
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  
19
Number of Electrons
43  
99+
83  
33
Radius of an Atom
  
  
Atomic Radius
136.00 pm  
99+
156.00 pm  
31
Covalent Radius
147.00 pm  
39
148.00 pm  
38
Van der Waals Radius
200.00 pm  
35
207.00 pm  
33
Atomic Weight
98.00 amu  
99+
208.98 amu  
29
Atomic Volume
8.50 cm3/mol  
99+
21.30 cm3/mol  
23
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  
-  
Lattice C/A Ratio
1.60  
21
1.86  
4
Mechanical
Density
  
  
Density At Room Temperature
11.00 g/cm3  
36
9.78 g/cm3  
99+
Density When Liquid (at m.p.)
11.00 g/cm3  
34
10.05 g/cm3  
99+
Tensile Strength
50.00 MPa  
38
32.00 MPa  
99+
Viscosity
0.00  
25
0.00  
29
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
22
Vapor Pressure at 2000 K
0.00 (Pa)  
99+
0.00 (Pa)  
24
Elasticity properties
  
  
Shear Modulus
27.00 GPa  
34
12.00 GPa  
99+
Bulk Modulus
100.00 GPa  
16
31.00 GPa  
99+
Young's Modulus
50.00 GPa  
39
32.00 GPa  
99+
Poisson Ratio
0.38  
6
0.33  
11
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
11.50  
37
9.79  
99+
Magnetic Ordering
Paramagnetic  
Diamagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
20
Susceptibility
0.00  
24
0.00  
36
Electrical Properties
  
  
Electrical Property
Conductor  
Semiconductor  
Resistivity
200.00 nΩ·m  
18
1.29 nΩ·m  
99+
Electrical Conductivity
0.07 106/cm Ω  
35
0.01 106/cm Ω  
99+
Electron Affinity
53.00 kJ/mol  
23
91.20 kJ/mol  
13
Thermal
Specific Heat
0.21 J/(kg K)  
30
0.12 J/(kg K)  
99+
Molar Heat Capacity
24.27 J/mol·K  
99+
25.52 J/mol·K  
99+
Thermal Conductivity
50.60 W/m·K  
30
7.97 W/m·K  
99+
Critical Temperature
2,150.00 K  
16
544.00 K  
99+
Thermal Expansion
7.10 µm/(m·K)  
99+
13.40 µm/(m·K)  
34
Enthalpy
  
  
Enthalpy of Vaporization
660.00 kJ/mol  
7
151.00 kJ/mol  
99+
Enthalpy of Fusion
23.01 kJ/mol  
9
10.90 kJ/mol  
39
Enthalpy of Atomization
649.00 kJ/mol  
9
207.10 kJ/mol  
99+
Standard Molar Entropy
181.10 J/mol.K  
2
56.70 J/mol.K  
32
Summary >>
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