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Tungsten vs Technetium

Tungsten
Technetium
Technetium vs Tungsten


Periodic Table
Symbol
W  
Tc  
Group Number
6  
12
7  
11
Period Number
6  
5  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
7440337  
99+
7440268  
99+
Space Group Name
Im_ 3m  
P63/mmc  
Space Group Number
229.00  
2
194.00  
7
Facts
Interesting Facts
  • Tungsten element has the second highest melting point.
  • Pure tungsten can easily cut down with the help of hacksaw.
  
  • Original name of Technetium was Masurium.
  • At the time of its discovery it found in sample of Molybdenum.
  
Sources
Earth's crust, Found in Minerals, Mining, Ores of Minerals  
Made by Bombarding Molybdenum with Deuterons  
History
  
  
Who Discovered
-  
Emilio Segrè and Carlo Perriero  
Discovery
In 1781  
In 1937  
Abundance
  
  
Abundance In Universe
0.00 %  
28
0.00 %  
40
Abundance In Sun
0.00 %  
23
0.00 %  
18
Abundance In Meteorites
0.00 %  
39
-  
Abundance In Earth's Crust
0.00 %  
39
0.00 %  
99+
Abundance In Oceans
0.00 %  
18
-  
Abundance In Humans
0.00 %  
24
-  
Uses
Uses & Benefits
  • Tungsten and its alloys are used in high-temperature applications like welding electrodes, high-temperature furnace, etc.
  • Tungsten carbide is very hard and used in metal working, mining and petroleum industry.
  
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  
Industrial Uses
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry  
-  
Medical Uses
-  
-  
Other Uses
Alloys  
Alloys, Nuclear Research, Research Purposes  
Biological Properties
  
  
Toxicity
Non Toxic  
Low Toxic  
Present in Human Body
Yes  
No  
In Blood
0.00 Blood/mg dm-3  
31
0.00 Blood/mg dm-3  
40
In Bone
0.00 p.p.m.  
40
0.00 p.p.m.  
99+
Physical
Melting Point
3,410.00 °C  
1
2,200.00 °C  
9
Boiling Point
5,660.00 °C  
1
4,877.00 °C  
7
Appearance
  
  
Physical State
Solid  
Solid  
Color
Grayish White  
Shiny Gray  
Luster
Lustrous  
-  
Hardness
  
  
Mohs Hardness
7.50  
2
2.25  
16
Brinell Hardness
2,000.00 MPa  
4
550.00 MPa  
27
Vickers Hardness
3,430.00 MPa  
3
500.00 MPa  
35
Speed of Sound
4,620.00 m/s  
20
16,200.00 m/s  
1
Optical Properties
  
  
Refractive Index
2.10  
11
1.90  
18
Reflectivity
62.00 %  
21
35.00 %  
34
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
W  
Tc  
Isotopes
  
  
Known Isotopes
33  
6
18  
21
Electronegativity
  
  
Pauling Electronegativity
2.36  
3
1.90  
12
Sanderson Electronegativity
0.98  
99+
1.90  
13
Allred Rochow Electronegativity
1.40  
20
1.36  
21
Mulliken-Jaffe Electronegativity
2.36  
3
1.90  
13
Allen Electronegativity
1.47  
33
1.51  
31
Electropositivity
  
  
Pauling Electropositivity
1.64  
99+
2.10  
99+
Ionization Energies
  
  
1st Energy Level
770.00 kJ/mol  
16
702.00 kJ/mol  
36
2nd Energy Level
1,700.00 kJ/mol  
30
1,470.00 kJ/mol  
99+
3rd Energy Level
2,045.40 kJ/mol  
99+
2,850.00 kJ/mol  
34
4th Energy Level
7,700.00 kJ/mol  
8
7,020.00 kJ/mol  
14
5th Energy Level
7,700.00 kJ/mol  
17
7,020.00 kJ/mol  
28
6th Energy Level
7,700.00 kJ/mol  
35
7,020.00 kJ/mol  
99+
7th Energy level
7,700.00 kJ/mol  
29
4,700.00 kJ/mol  
99+
8th Energy Level
7,700.00 kJ/mol  
29
4,700.00 kJ/mol  
99+
9th Energy Level
7,700.00 kJ/mol  
25
7,020.00 kJ/mol  
35
10th Energy Level
7,700.00 kJ/mol  
29
7,020.00 kJ/mol  
39
11th Energy Level
7,700.00 kJ/mol  
28
7,020.00 kJ/mol  
37
12th Energy Level
7,700.00 kJ/mol  
99+
7,020.00 kJ/mol  
99+
13th Energy Level
7,700.00 kJ/mol  
21
7,020.00 kJ/mol  
33
14th Energy Level
770.00 kJ/mol  
99+
7,020.00 kJ/mol  
23
15th Energy Level
77,000.00 kJ/mol  
18
70,200.00 kJ/mol  
29
16th Energy Level
77,000.00 kJ/mol  
13
70,200.00 kJ/mol  
24
17th Energy Level
770.00 kJ/mol  
34
702.50 kJ/mol  
99+
18th Energy Level
7,700.00 kJ/mol  
24
7,020.00 kJ/mol  
35
19th Energy Level
770.00 kJ/mol  
31
702.00 kJ/mol  
99+
20th Energy Level
770.00 kJ/mol  
25
702.00 kJ/mol  
35
21st Energy Level
770.00 kJ/mol  
99+
702.00 kJ/mol  
99+
22nd Energy Level
770.00 kJ/mol  
19
702.00 kJ/mol  
29
23rd Energy Level
770.00 kJ/mol  
99+
702.00 kJ/mol  
99+
24th Energy Level
770.00 kJ/mol  
15
702.50 kJ/mol  
28
25th Energy Level
770.00 kJ/mol  
14
702.00 kJ/mol  
30
26th Energy Level
770.00 kJ/mol  
14
702.00 kJ/mol  
29
27th Energy Level
770.00 kJ/mol  
13
702.00 kJ/mol  
30
28th Energy Level
770.00 kJ/mol  
19
702.00 kJ/mol  
35
29th Energy Level
770.00 kJ/mol  
19
702.00 kJ/mol  
36
30th Energy Level
770.00 kJ/mol  
14
702.00 kJ/mol  
30
Electrochemical Equivalent
1.14 g/amp-hr  
99+
0.52 g/amp-hr  
99+
Electron Work Function
4.55 eV  
18
4.90 eV  
12
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility  
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Atomic
Atomic Number
74  
99+
43  
99+
Electron Configuration
[Xe] 4f14 5d4 6s2  
[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
74  
99+
43  
99+
Number of Neutrons
110  
28
55  
99+
Number of Electrons
74  
99+
43  
99+
Radius of an Atom
  
  
Atomic Radius
139.00 pm  
99+
136.00 pm  
99+
Covalent Radius
162.00 pm  
31
147.00 pm  
39
Van der Waals Radius
200.00 pm  
35
200.00 pm  
35
Atomic Weight
183.84 amu  
37
98.00 amu  
99+
Atomic Volume
9.53 cm3/mol  
99+
8.50 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Tantalum
  
Molybdenum
  
Next Element
Rhenium
  
Ruthenium
  
Valence Electron Potential
140.00 (-eV)  
5
180.00 (-eV)  
3
Lattice Constant
316.52 pm  
99+
273.50 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.29  
99+
1.60  
21
Mechanical
Density
  
  
Density At Room Temperature
19.25 g/cm3  
16
11.00 g/cm3  
36
Density When Liquid (at m.p.)
17.60 g/cm3  
15
11.00 g/cm3  
34
Tensile Strength
370.00 MPa  
11
50.00 MPa  
38
Viscosity
0.00  
1
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
99+
0.00 (Pa)  
99+
Elasticity properties
  
  
Shear Modulus
161.00 GPa  
5
27.00 GPa  
34
Bulk Modulus
310.00 GPa  
4
100.00 GPa  
16
Young's Modulus
411.00 GPa  
4
50.00 GPa  
39
Poisson Ratio
0.28  
17
0.38  
6
Other Mechanical Properties
Ductile, Malleable  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
19.22  
18
11.50  
37
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
17
Susceptibility
0.00  
23
0.00  
24
Electrical Properties
  
  
Electrical Property
Superconductor  
Conductor  
Resistivity
52.80 nΩ·m  
99+
200.00 nΩ·m  
18
Electrical Conductivity
0.19 106/cm Ω  
10
0.07 106/cm Ω  
35
Electron Affinity
78.60 kJ/mol  
15
53.00 kJ/mol  
23
Thermal
Specific Heat
0.13 J/(kg K)  
40
0.21 J/(kg K)  
30
Molar Heat Capacity
24.27 J/mol·K  
99+
24.27 J/mol·K  
99+
Thermal Conductivity
173.00 W/m·K  
7
50.60 W/m·K  
30
Critical Temperature
3,695.00 K  
1
2,150.00 K  
16
Thermal Expansion
4.50 µm/(m·K)  
99+
7.10 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
799.10 kJ/mol  
1
660.00 kJ/mol  
7
Enthalpy of Fusion
35.23 kJ/mol  
1
23.01 kJ/mol  
9
Enthalpy of Atomization
837.00 kJ/mol  
1
649.00 kJ/mol  
9
Standard Molar Entropy
32.60 J/mol.K  
99+
181.10 J/mol.K  
2
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