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Technetium vs Tungsten

Technetium
Tungsten
Tungsten vs Technetium


Periodic Table
Symbol
Tc   
W   
Group Number
7   
11
6   
12
Period Number
5   
6   
Block
d block   
d block   
Element Family
Transition Metal   
Transition Metal   
CAS Number
7440268   
99+
7440337   
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.
  
  • Tungsten element has the second highest melting point.
  • Pure tungsten can easily cut down with the help of hacksaw.
  
Sources
Made by Bombarding Molybdenum with Deuterons   
Earth's crust, Found in Minerals, Mining, Ores of Minerals   
History
  
  
Who Discovered
Emilio Segrè and Carlo Perriero   
Not Available   
Discovery
In 1937   
In 1781   
Abundance
  
  
Abundance In Universe
Not Available   
5 * 10-8 %   
27
Abundance In Sun
~-9999 %   
~0.0000004 %   
23
Abundance In Meteorites
Not Available   
0.00 %   
39
Abundance In Earth's Crust
Not Available   
0.00 %   
39
Abundance In Oceans
Not Available   
0.00 %   
18
Uses
Uses & Benefits
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  
  • 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.
  
Industrial Uses
NA   
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry   
Medical Uses
NA   
NA   
Other Uses
Alloys, Nuclear Research, Research Purposes   
Alloys   
Biological Properties
  
  
Toxicity
Low Toxic   
Non 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
0.00 p.p.m.   
35
Physical Properties
Melting Point
2,200.00 °C   
9
3,410.00 °C   
1
Boiling Point
4,877.00 °C   
7
5,660.00 °C   
1
Appearance
  
  
Physical State
Solid   
Solid   
Color
Shiny Gray   
Grayish White   
Luster
NA   
Lustrous   
Hardness
  
  
Mohs Hardness
Not Available   
7.50   
2
Brinell Hardness
Not Available   
2,000.00 MPa   
4
Vickers Hardness
Not Available   
3,430.00 MPa   
1
Speed of Sound
16,200.00 m/s   
1
4,620.00 m/s   
16
Optical Properties
  
  
Reflectivity
Not Available   
62.00 %   
13
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   
W   
Isotopes
  
  
Known Isotopes
18   
21
33   
6
Electronegativity
  
  
Pauling Electronegativity
1.90   
11
2.36   
2
Sanderson Electronegativity
Not Available   
0.98   
23
Allred Rochow Electronegativity
1.36   
20
1.40   
19
Allen Electronegativity
1.51   
28
1.47   
29
Electropositivity
  
  
Pauling Electropositivity
2.10   
99+
1.64   
99+
Ionization Energies
  
  
1st Energy Level
702.00 kJ/mol   
36
770.00 kJ/mol   
16
2nd Energy Level
1,470.00 kJ/mol   
99+
1,700.00 kJ/mol   
29
3rd Energy Level
2,850.00 kJ/mol   
33
Not Available   
Electrochemical Equivalent
0.52 g/amp-hr   
99+
1.14 g/amp-hr   
99+
Electron Work Function
Not Available   
4.55 eV   
13
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Ionization, Radioactive Isotopes, Solubility   
Atomic Properties
Atomic Number
43   
99+
74   
99+
Electron Configuration
[Kr] 4d5 5s2   
[Xe] 4f14 5d4 6s2   
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+
74   
99+
Number of Neutrons
55   
99+
110   
27
Number of Electrons
43   
99+
74   
99+
Radius of an Atom
  
  
Atomic Radius
136.00 pm   
99+
139.00 pm   
39
Covalent Radius
147.00 pm   
37
162.00 pm   
29
Van der Waals Radius
200.00 pm   
28
200.00 pm   
28
Atomic Weight
98.00 amu   
99+
183.84 amu   
37
Atomic Volume
8.50 cm3/mol   
99+
9.53 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Molybdenum
  
Tantalum
  
Next Element
Ruthenium
  
Rhenium
  
Valence Electron Potential
180.00 (-eV)   
3
140.00 (-eV)   
5
Lattice Constant
273.50 pm   
99+
316.52 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
19.25 g/cm3   
16
Density When Liquid (at m.p.)
Not Available   
17.60 g/cm3   
5
Tensile Strength
Not Available   
370.00 MPa   
10
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 2000 K
Not Available   
0.00 (Pa)   
32
Elasticity properties
  
  
Shear Modulus
Not Available   
161.00 GPa   
5
Bulk Modulus
Not Available   
310.00 GPa   
4
Young's Modulus
Not Available   
411.00 GPa   
4
Poisson Ratio
Not Available   
0.28   
17
Other Mechanical Properties
NA   
Ductile, Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
11.50   
24
19.22   
9
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Superconductor   
Resistivity
200.00 nΩ·m   
18
52.80 nΩ·m   
99+
Electrical Conductivity
0.07 106/cm Ω   
30
0.19 106/cm Ω   
10
Electron Affinity
53.00 kJ/mol   
18
78.60 kJ/mol   
13
Thermal Properties
Specific Heat
0.21 J/(kg K)   
29
0.13 J/(kg K)   
39
Molar Heat Capacity
24.27 J/mol·K   
99+
24.27 J/mol·K   
99+
Thermal Conductivity
50.60 W/m·K   
30
173.00 W/m·K   
7
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
7.10 µm/(m·K)   
99+
4.50 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
660.00 kJ/mol   
6
799.10 kJ/mol   
1
Enthalpy of Fusion
23.01 kJ/mol   
9
35.23 kJ/mol   
1
Enthalpy of Atomization
649.00 kJ/mol   
8
837.00 kJ/mol   
1
Standard Molar Entropy
181.10 J/mol.K   
2
32.60 J/mol.K   
99+
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