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Technetium Molybdenum Comparison

Technetium
Molybdenum
Molybdenum Technetium comparison


Periodic Table
Symbol
Tc  
Mo  
Group Number
7  
11
6  
12
Period Number
5  
5  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
7440268  
99+
7439987  
99+
Space Group Name
P63/mmc  
Im_ 3m  
Space Group Number
194.00  
7
229.00  
2
Facts
Interesting Facts
  • Original name of Technetium was Masurium.
  • At the time of its discovery it found in sample of Molybdenum.
  
  • Molybdenum is highly reactive metal, hence not found free in nature .
  • Till 18th century Molybdenum element were often mistaken as a carbon or Lead.
  
Sources
Made by Bombarding Molybdenum with Deuterons  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Emilio Segrè and Carlo Perriero  
Carl Wilhelm Scheele  
Discovery
In 1937  
In 1778  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
20
Abundance In Sun
0.00 %  
18
0.00 %  
19
Abundance In Meteorites
-  
0.00 %  
24
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
39
Abundance In Oceans
-  
0.00 %  
9
Abundance In Humans
-  
0.00 %  
17
Uses
Uses & Benefits
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  
  • Its alloys are used to make engine parts, drills, saw blade, etc.
  • Lubricant additive made up of Molybdenum disulfide is commonly used in the industry. It is also used as a catalyst.
  
Industrial Uses
-  
Aerospace Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
-  
Other Uses
Alloys, Nuclear Research, Research Purposes  
Alloys  
Biological Properties
  
  
Toxicity
Low Toxic  
Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
31
In Bone
0.00 p.p.m.  
99+
0.70 p.p.m.  
20
Physical
Melting Point
2,200.00 °C  
9
2,617.00 °C  
5
Boiling Point
4,877.00 °C  
7
4,612.00 °C  
9
Appearance
  
  
Physical State
Solid  
Solid  
Color
Shiny Gray  
Gray  
Luster
-  
Metallic  
Hardness
  
  
Mohs Hardness
2.25  
16
5.50  
7
Brinell Hardness
550.00 MPa  
27
1,370.00 MPa  
7
Vickers Hardness
500.00 MPa  
35
1,400.00 MPa  
11
Speed of Sound
16,200.00 m/s  
1
5,400.00 m/s  
9
Optical Properties
  
  
Refractive Index
1.90  
18
2.00  
15
Reflectivity
35.00 %  
34
58.00 %  
25
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Tc  
Mo  
Isotopes
  
  
Known Isotopes
18  
21
25  
14
Electronegativity
  
  
Pauling Electronegativity
1.90  
12
2.16  
6
Sanderson Electronegativity
1.90  
13
1.15  
34
Allred Rochow Electronegativity
1.36  
21
1.30  
25
Mulliken-Jaffe Electronegativity
1.90  
13
2.16  
7
Allen Electronegativity
1.51  
31
2.16  
3
Electropositivity
  
  
Pauling Electropositivity
2.10  
99+
1.84  
99+
Ionization Energies
  
  
1st Energy Level
702.00 kJ/mol  
36
684.30 kJ/mol  
37
2nd Energy Level
1,470.00 kJ/mol  
99+
1,560.00 kJ/mol  
38
3rd Energy Level
2,850.00 kJ/mol  
34
2,618.00 kJ/mol  
99+
4th Energy Level
7,020.00 kJ/mol  
14
4,480.00 kJ/mol  
36
5th Energy Level
7,020.00 kJ/mol  
28
5,257.00 kJ/mol  
99+
6th Energy Level
7,020.00 kJ/mol  
99+
6,640.80 kJ/mol  
99+
7th Energy level
4,700.00 kJ/mol  
99+
12,125.00 kJ/mol  
13
8th Energy Level
4,700.00 kJ/mol  
99+
13,860.00 kJ/mol  
16
9th Energy Level
7,020.00 kJ/mol  
35
15,835.00 kJ/mol  
16
10th Energy Level
7,020.00 kJ/mol  
39
17,980.00 kJ/mol  
18
11th Energy Level
7,020.00 kJ/mol  
37
20,190.00 kJ/mol  
17
12th Energy Level
7,020.00 kJ/mol  
99+
22,219.00 kJ/mol  
38
13th Energy Level
7,020.00 kJ/mol  
33
26,930.00 kJ/mol  
13
14th Energy Level
7,020.00 kJ/mol  
23
29,196.00 kJ/mol  
13
15th Energy Level
70,200.00 kJ/mol  
29
52,490.00 kJ/mol  
99+
16th Energy Level
70,200.00 kJ/mol  
24
55,000.00 kJ/mol  
99+
17th Energy Level
702.50 kJ/mol  
99+
61,400.00 kJ/mol  
9
18th Energy Level
7,020.00 kJ/mol  
35
67,700.00 kJ/mol  
9
19th Energy Level
702.00 kJ/mol  
99+
74,000.00 kJ/mol  
9
20th Energy Level
702.00 kJ/mol  
35
80,400.00 kJ/mol  
10
21st Energy Level
702.00 kJ/mol  
99+
87,000.00 kJ/mol  
9
22nd Energy Level
702.00 kJ/mol  
29
93,400.00 kJ/mol  
7
23rd Energy Level
702.00 kJ/mol  
99+
98,420.00 kJ/mol  
6
24th Energy Level
702.50 kJ/mol  
28
104,400.00 kJ/mol  
2
25th Energy Level
702.00 kJ/mol  
30
121,900.00 kJ/mol  
1
26th Energy Level
702.00 kJ/mol  
29
127,700.00 kJ/mol  
1
27th Energy Level
702.00 kJ/mol  
30
133,800.00 kJ/mol  
1
28th Energy Level
702.00 kJ/mol  
35
139,800.00 kJ/mol  
1
29th Energy Level
702.00 kJ/mol  
36
148,100.00 kJ/mol  
1
30th Energy Level
702.00 kJ/mol  
30
154,500.00 kJ/mol  
1
Electrochemical Equivalent
0.52 g/amp-hr  
99+
0.89 g/amp-hr  
99+
Electron Work Function
4.90 eV  
12
4.60 eV  
17
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
43  
99+
42  
99+
Electron Configuration
[Kr] 4d5 5s2  
[Kr] 4d5 5s1  
Crystal Structure
Hexagonal Close Packed (HCP)  
Body Centered Cubic (BCC)  
Crystal Lattice
HCP-Crystal-Structure-of-Technetium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
43  
99+
42  
99+
Number of Neutrons
55  
99+
54  
99+
Number of Electrons
43  
99+
42  
99+
Radius of an Atom
  
  
Atomic Radius
136.00 pm  
99+
139.00 pm  
99+
Covalent Radius
147.00 pm  
39
154.00 pm  
34
Van der Waals Radius
200.00 pm  
35
200.00 pm  
35
Atomic Weight
98.00 amu  
99+
95.95 amu  
99+
Atomic Volume
8.50 cm3/mol  
99+
9.40 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Molybdenum
  
Niobium
  
Next Element
Ruthenium
  
Technetium
  
Valence Electron Potential
180.00 (-eV)  
3
88.60 (-eV)  
13
Lattice Constant
273.50 pm  
99+
314.70 pm  
99+
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, π/2  
Lattice C/A Ratio
1.60  
21
1.03  
99+
Mechanical
Density
  
  
Density At Room Temperature
11.00 g/cm3  
36
10.28 g/cm3  
39
Density When Liquid (at m.p.)
11.00 g/cm3  
34
9.33 g/cm3  
99+
Tensile Strength
50.00 MPa  
38
324.00 MPa  
15
Viscosity
0.00  
25
0.00  
5
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)  
27
Elasticity properties
  
  
Shear Modulus
27.00 GPa  
34
126.00 GPa  
8
Bulk Modulus
100.00 GPa  
16
230.00 GPa  
6
Young's Modulus
50.00 GPa  
39
329.00 GPa  
6
Poisson Ratio
0.38  
6
0.31  
13
Other Mechanical Properties
-  
Ductile, Weldable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
11.50  
37
10.22  
40
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
9
Susceptibility
0.00  
24
0.00  
29
Electrical Properties
  
  
Electrical Property
Conductor  
Semiconductor  
Resistivity
200.00 nΩ·m  
18
53.40 nΩ·m  
99+
Electrical Conductivity
0.07 106/cm Ω  
35
0.19 106/cm Ω  
11
Electron Affinity
53.00 kJ/mol  
23
71.90 kJ/mol  
16
Thermal
Specific Heat
0.21 J/(kg K)  
30
0.25 J/(kg K)  
21
Molar Heat Capacity
24.27 J/mol·K  
99+
24.06 J/mol·K  
99+
Thermal Conductivity
50.60 W/m·K  
30
138.00 W/m·K  
12
Critical Temperature
2,150.00 K  
16
2,896.00 K  
6
Thermal Expansion
7.10 µm/(m·K)  
99+
4.80 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
660.00 kJ/mol  
7
594.10 kJ/mol  
9
Enthalpy of Fusion
23.01 kJ/mol  
9
27.61 kJ/mol  
5
Enthalpy of Atomization
649.00 kJ/mol  
9
653.00 kJ/mol  
7
Standard Molar Entropy
181.10 J/mol.K  
2
28.70 J/mol.K  
99+
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