Technetium Cobalt Comparison
Periodic Table
Symbol
Tc
Co
Group Number
7
11
9
9
Period Number
5
4
Block
d block
d block
Element Family
Transition Metal
Transition Metal
CAS Number
7440268
99+
7440484
38
Space Group Name
P63/mmc
P63/mmc
Space Group Number
194.00
5
194.00
5
Facts
Interesting Facts
- Original name of Technetium was Masurium.
- At the time of its discovery it found in sample of Molybdenum.
- The main source of Cobalt is as a by-product of copper and nickel metal mining.
- Cobalt metal can be obtained from other elements like Oxygen, Sulfur and Arsenic.
- It s also used in electroplating process as it exhibits anti cession properties.
Sources
Made by Bombarding Molybdenum with Deuterons
Found in Compounds, Mining, Ores of Minerals
History
Who Discovered
Emilio Segrè and Carlo Perriero
Georg Brandt
Discovery
In 1937
In 1732
Abundance
Abundance In Universe
Not Available
3 * 10-4 %
9
Abundance In Sun
~-9999 %
~0.0004 %
9
Abundance In Meteorites
Not Available
0.06 %
10
Abundance In Earth's Crust
Not Available
0.00 %
21
Abundance In Oceans
Not Available
0.00 %
20
Abundance In Humans
Not Available
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 with aluminum and nickel are used to make powerful magnets.
- Few other alloys exhibit high-temperature strength and hence they are used in Turbines of Jet and Gas engine.
Industrial Uses
NA
Chemical Industry, Electrical Industry, Electronic Industry
Medical Uses
NA
Pharmaceutical Industry
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
0.04 Blood/mg dm-3
18
In Bone
0.00 p.p.m.
36
0.04 p.p.m.
27
Physical Properties
Melting Point
2,200.00 °C
9
1,495.00 °C
29
Boiling Point
4,877.00 °C
7
2,870.00 °C
34
Appearance
Physical State
Solid
Solid
Color
Shiny Gray
Gray
Luster
NA
Metallic
Hardness
Mohs Hardness
Not Available
5.00
8
Brinell Hardness
Not Available
470.00 MPa
26
Vickers Hardness
Not Available
1,043.00 MPa
11
Speed of Sound
16,200.00 m/s
1
4,720.00 m/s
14
Optical Properties
Reflectivity
Not Available
67.00 %
11
Allotropes
No
Yes
α Allotropes
Not Available
α-Cobalt
β Allotropes
Not Available
β-Cobalt
γ Allotropes
Not Available
Not Available
Chemical Properties
Chemical Formula
Tc
Co
Isotopes
Known Isotopes
18
21
26
13
Electronegativity
Pauling Electronegativity
1.90
11
1.88
12
Sanderson Electronegativity
Not Available
2.56
1
Allred Rochow Electronegativity
1.36
20
1.70
5
Allen Electronegativity
1.51
28
1.84
10
Electropositivity
Pauling Electropositivity
2.10
99+
2.12
99+
Ionization Energies
1st Energy Level
702.00 kJ/mol
36
760.40 kJ/mol
19
2nd Energy Level
1,470.00 kJ/mol
99+
1,648.00 kJ/mol
31
3rd Energy Level
2,850.00 kJ/mol
33
3,232.00 kJ/mol
22
4th Energy Level
Not Available
4,950.00 kJ/mol
19
5th Energy Level
Not Available
7,670.00 kJ/mol
12
6th Energy Level
Not Available
9,840.00 kJ/mol
12
7th Energy level
Not Available
12,440.00 kJ/mol
11
8th Energy Level
Not Available
15,230.00 kJ/mol
12
9th Energy Level
Not Available
17,959.00 kJ/mol
13
10th Energy Level
Not Available
26,570.00 kJ/mol
7
11th Energy Level
Not Available
29,400.00 kJ/mol
8
12th Energy Level
Not Available
32,400.00 kJ/mol
8
13th Energy Level
Not Available
36,600.00 kJ/mol
8
14th Energy Level
Not Available
39,700.00 kJ/mol
9
15th Energy Level
Not Available
42,800.00 kJ/mol
12
16th Energy Level
Not Available
49,396.00 kJ/mol
11
17th Energy Level
Not Available
52,737.00 kJ/mol
13
18th Energy Level
Not Available
134,810.00 kJ/mol
1
19th Energy Level
Not Available
145,170.00 kJ/mol
2
20th Energy Level
Not Available
154,700.00 kJ/mol
4
21st Energy Level
Not Available
167,400.00 kJ/mol
4
22nd Energy Level
Not Available
178,100.00 kJ/mol
3
23rd Energy Level
Not Available
189,300.00 kJ/mol
3
Electrochemical Equivalent
0.52 g/amp-hr
99+
1.10 g/amp-hr
99+
Electron Work Function
Not Available
5.00 eV
5
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility
Chemical Stability, Ionization
Atomic Properties
Atomic Number
43
99+
22
99+
Electron Configuration
[Kr] 4d5 5s2
[Ar] 3d2 4s2
Crystal Structure
Hexagonal Close Packed (HCP)
Hexagonal Close Packed (HCP)
Crystal Lattice
HCP-Crystal-Structure-of-Technetium.jpg#100
HCP-Crystal-Structure-of-Cobalt.jpg#100
Atom
Number of Protons
43
99+
22
99+
Number of Neutrons
55
99+
26
99+
Number of Electrons
43
99+
22
99+
Radius of an Atom
Atomic Radius
136.00 pm
99+
147.00 pm
34
Covalent Radius
147.00 pm
37
160.00 pm
30
Van der Waals Radius
200.00 pm
28
200.00 pm
28
Atomic Weight
98.00 amu
99+
47.87 amu
99+
Atomic Volume
8.50 cm3/mol
99+
10.64 cm3/mol
99+
Adjacent Atomic Numbers
Valence Electron Potential
180.00 (-eV)
3
95.20 (-eV)
10
Lattice Constant
273.50 pm
99+
295.08 pm
99+
Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, 2 π/3
Lattice C/A Ratio
1.60
5
Not Available
Mechanical Properties
Density
Density At Room Temperature
11.00 g/cm3
34
4.51 g/cm3
99+
Density When Liquid (at m.p.)
Not Available
4.11 g/cm3
99+
Tensile Strength
Not Available
434.00 MPa
9
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 2000 K
Not Available
0.98 (Pa)
14
Elasticity properties
Shear Modulus
Not Available
44.00 GPa
17
Bulk Modulus
Not Available
110.00 GPa
15
Young's Modulus
Not Available
116.00 GPa
18
Poisson Ratio
Not Available
0.32
12
Other Mechanical Properties
NA
Ductile
Magnetic Properties
Magnetic Characteristics
Specific Gravity
11.50
24
4,500.00
1
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Conductor
Poor Conductor
Resistivity
200.00 nΩ·m
18
420.00 nΩ·m
12
Electrical Conductivity
0.07 106/cm Ω
30
0.02 106/cm Ω
99+
Electron Affinity
53.00 kJ/mol
18
7.60 kJ/mol
37
Thermal Properties
Specific Heat
0.21 J/(kg K)
29
0.52 J/(kg K)
9
Molar Heat Capacity
24.27 J/mol·K
99+
25.06 J/mol·K
99+
Thermal Conductivity
50.60 W/m·K
30
21.90 W/m·K
99+
Critical Temperature
Not Available
Not Available
Thermal Expansion
7.10 µm/(m·K)
99+
8.60 µm/(m·K)
99+
Enthalpy
Enthalpy of Vaporization
660.00 kJ/mol
6
429.00 kJ/mol
15
Enthalpy of Fusion
23.01 kJ/mol
9
15.48 kJ/mol
19
Enthalpy of Atomization
649.00 kJ/mol
8
468.60 kJ/mol
15
Standard Molar Entropy
181.10 J/mol.K
2
27.30 J/mol.K
99+
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