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Technetium vs Molybdenum

Technetium
Molybdenum
Molybdenum vs Technetium


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   
5
229.00   
1
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
Not Available   
5 * 10-7 %   
19
Abundance In Sun
~-9999 %   
~0.0000009 %   
19
Abundance In Meteorites
Not Available   
0.00 %   
24
Abundance In Earth's Crust
Not Available   
0.00 %   
39
Abundance In Oceans
Not Available   
0.00 %   
9
Abundance In Humans
Not Available   
0.00 %   
14
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
NA   
Aerospace Industry, Electrical Industry, Electronic Industry   
Medical Uses
NA   
NA   
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   
37
0.00 Blood/mg dm-3   
31
In Bone
0.00 p.p.m.   
36
0.70 p.p.m.   
18
Physical Properties
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
NA   
Metallic   
Hardness
  
  
Mohs Hardness
Not Available   
5.50   
7
Brinell Hardness
Not Available   
1,370.00 MPa   
7
Vickers Hardness
Not Available   
1,400.00 MPa   
6
Speed of Sound
16,200.00 m/s   
1
5,400.00 m/s   
6
Optical Properties
  
  
Reflectivity
Not Available   
58.00 %   
15
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   
Mo   
Isotopes
  
  
Known Isotopes
18   
21
25   
14
Electronegativity
  
  
Pauling Electronegativity
1.90   
11
2.16   
5
Sanderson Electronegativity
Not Available   
1.15   
19
Allred Rochow Electronegativity
1.36   
20
1.30   
24
Allen Electronegativity
1.51   
28
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   
37
3rd Energy Level
2,850.00 kJ/mol   
33
2,618.00 kJ/mol   
99+
4th Energy Level
Not Available   
4,480.00 kJ/mol   
26
5th Energy Level
Not Available   
5,257.00 kJ/mol   
32
6th Energy Level
Not Available   
6,640.80 kJ/mol   
22
7th Energy level
Not Available   
12,125.00 kJ/mol   
13
8th Energy Level
Not Available   
13,860.00 kJ/mol   
16
9th Energy Level
Not Available   
15,835.00 kJ/mol   
16
10th Energy Level
Not Available   
17,980.00 kJ/mol   
18
11th Energy Level
Not Available   
20,190.00 kJ/mol   
17
12th Energy Level
Not Available   
22,219.00 kJ/mol   
15
13th Energy Level
Not Available   
26,930.00 kJ/mol   
13
14th Energy Level
Not Available   
29,196.00 kJ/mol   
13
15th Energy Level
Not Available   
52,490.00 kJ/mol   
7
16th Energy Level
Not Available   
55,000.00 kJ/mol   
8
17th Energy Level
Not Available   
61,400.00 kJ/mol   
9
18th Energy Level
Not Available   
67,700.00 kJ/mol   
9
19th Energy Level
Not Available   
74,000.00 kJ/mol   
9
20th Energy Level
Not Available   
80,400.00 kJ/mol   
10
21st Energy Level
Not Available   
87,000.00 kJ/mol   
9
22nd Energy Level
Not Available   
93,400.00 kJ/mol   
7
23rd Energy Level
Not Available   
98,420.00 kJ/mol   
6
24th Energy Level
Not Available   
104,400.00 kJ/mol   
2
25th Energy Level
Not Available   
121,900.00 kJ/mol   
1
26th Energy Level
Not Available   
127,700.00 kJ/mol   
1
27th Energy Level
Not Available   
133,800.00 kJ/mol   
1
28th Energy Level
Not Available   
139,800.00 kJ/mol   
1
29th Energy Level
Not Available   
148,100.00 kJ/mol   
1
30th Energy Level
Not Available   
154,500.00 kJ/mol   
1
Electrochemical Equivalent
0.52 g/amp-hr   
99+
0.89 g/amp-hr   
99+
Electron Work Function
Not Available   
4.60 eV   
12
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility   
Atomic Properties
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   
39
Covalent Radius
147.00 pm   
37
154.00 pm   
32
Van der Waals Radius
200.00 pm   
28
200.00 pm   
28
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   
5
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
11.00 g/cm3   
34
10.28 g/cm3   
36
Density When Liquid (at m.p.)
Not Available   
9.33 g/cm3   
20
Tensile Strength
Not Available   
324.00 MPa   
13
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 2000 K
Not Available   
0.00 (Pa)   
26
Elasticity properties
  
  
Shear Modulus
Not Available   
126.00 GPa   
8
Bulk Modulus
Not Available   
230.00 GPa   
6
Young's Modulus
Not Available   
329.00 GPa   
6
Poisson Ratio
Not Available   
0.31   
13
Other Mechanical Properties
NA   
Ductile, Weldable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
11.50   
24
10.22   
27
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Semiconductor   
Resistivity
200.00 nΩ·m   
18
53.40 nΩ·m   
99+
Electrical Conductivity
0.07 106/cm Ω   
30
0.19 106/cm Ω   
11
Electron Affinity
53.00 kJ/mol   
18
71.90 kJ/mol   
14
Thermal Properties
Specific Heat
0.21 J/(kg K)   
29
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
Not Available   
Not Available   
Thermal Expansion
7.10 µm/(m·K)   
99+
4.80 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
660.00 kJ/mol   
6
594.10 kJ/mol   
8
Enthalpy of Fusion
23.01 kJ/mol   
9
27.61 kJ/mol   
5
Enthalpy of Atomization
649.00 kJ/mol   
8
653.00 kJ/mol   
7
Standard Molar Entropy
181.10 J/mol.K   
2
28.70 J/mol.K   
99+
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