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Technetium vs Manganese

Technetium
Manganese
Manganese vs Technetium


Periodic Table
Symbol
Tc  
Mn  
Group Number
7  
11
7  
11
Period Number
5  
4  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
7440268  
99+
7439965  
99+
Space Group Name
P63/mmc  
I_ 43m  
Space Group Number
194.00  
7
217.00  
5
Facts
Interesting Facts
  • Original name of Technetium was Masurium.
  • At the time of its discovery it found in sample of Molybdenum.
  
  • Manganese is an essential trace element in all forms of life.
  • Manganese metal oxidizes very easily, but it does not fuse that easily.
  
Sources
Made by Bombarding Molybdenum with Deuterons  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Emilio Segrè and Carlo Perriero  
Johann Gottlieb Gahn  
Discovery
In 1937  
In 1774  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
9
Abundance In Sun
0.00 %  
18
0.00 %  
8
Abundance In Meteorites
-  
0.27 %  
8
Abundance In Earth's Crust
0.00 %  
99+
0.11 %  
8
Abundance In Oceans
-  
0.00 %  
13
Abundance In Humans
-  
0.00 %  
15
Uses
Uses & Benefits
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  
  • This metal is very brittle hence it mostly not used as a pure metal, but its alloys are very useful
  • Its alloy Manganese steel is extremely strong and used in railway tracks, safes, prison bars and riffle barrels.
  
Industrial Uses
-  
Automobile 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
0.08 Blood/mg dm-3  
14
In Bone
0.00 p.p.m.  
99+
100.00 p.p.m.  
8
Physical
Melting Point
2,200.00 °C  
9
1,245.00 °C  
37
Boiling Point
4,877.00 °C  
7
1,962.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Shiny Gray  
Silver  
Luster
-  
Metallic  
Hardness
  
  
Mohs Hardness
2.25  
16
6.00  
6
Brinell Hardness
550.00 MPa  
27
196.00 MPa  
99+
Vickers Hardness
500.00 MPa  
35
196.00 MPa  
99+
Speed of Sound
16,200.00 m/s  
1
5,150.00 m/s  
11
Optical Properties
  
  
Refractive Index
1.90  
18
2.00  
15
Reflectivity
35.00 %  
34
70.00 %  
13
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Tc  
Mn  
Isotopes
  
  
Known Isotopes
18  
21
21  
18
Electronegativity
  
  
Pauling Electronegativity
1.90  
12
1.55  
26
Sanderson Electronegativity
1.90  
13
2.20  
8
Allred Rochow Electronegativity
1.36  
21
1.60  
10
Mulliken-Jaffe Electronegativity
1.90  
13
1.55  
23
Allen Electronegativity
1.51  
31
1.75  
18
Electropositivity
  
  
Pauling Electropositivity
2.10  
99+
2.45  
29
Ionization Energies
  
  
1st Energy Level
702.00 kJ/mol  
36
717.30 kJ/mol  
30
2nd Energy Level
1,470.00 kJ/mol  
99+
1,509.00 kJ/mol  
40
3rd Energy Level
2,850.00 kJ/mol  
34
3,248.00 kJ/mol  
21
4th Energy Level
7,020.00 kJ/mol  
14
4,940.00 kJ/mol  
30
5th Energy Level
7,020.00 kJ/mol  
28
6,990.00 kJ/mol  
29
6th Energy Level
7,020.00 kJ/mol  
99+
9,220.00 kJ/mol  
22
7th Energy level
4,700.00 kJ/mol  
99+
11,500.00 kJ/mol  
16
8th Energy Level
4,700.00 kJ/mol  
99+
18,770.00 kJ/mol  
5
9th Energy Level
7,020.00 kJ/mol  
35
21,400.00 kJ/mol  
6
10th Energy Level
7,020.00 kJ/mol  
39
23,960.00 kJ/mol  
9
11th Energy Level
7,020.00 kJ/mol  
37
27,590.00 kJ/mol  
10
12th Energy Level
7,020.00 kJ/mol  
99+
30,330.00 kJ/mol  
32
13th Energy Level
7,020.00 kJ/mol  
33
33,150.00 kJ/mol  
11
14th Energy Level
7,020.00 kJ/mol  
23
38,880.00 kJ/mol  
10
15th Energy Level
70,200.00 kJ/mol  
29
41,987.00 kJ/mol  
99+
16th Energy Level
70,200.00 kJ/mol  
24
109,480.00 kJ/mol  
1
17th Energy Level
702.50 kJ/mol  
99+
118,100.00 kJ/mol  
2
18th Energy Level
7,020.00 kJ/mol  
35
127,100.00 kJ/mol  
3
19th Energy Level
702.00 kJ/mol  
99+
138,600.00 kJ/mol  
4
20th Energy Level
702.00 kJ/mol  
35
148,500.00 kJ/mol  
6
21st Energy Level
702.00 kJ/mol  
99+
158,600.00 kJ/mol  
6
22nd Energy Level
702.00 kJ/mol  
29
172,500.00 kJ/mol  
5
23rd Energy Level
702.00 kJ/mol  
99+
181,380.00 kJ/mol  
5
24th Energy Level
702.50 kJ/mol  
28
650.90 kJ/mol  
34
25th Energy Level
702.00 kJ/mol  
30
717.30 kJ/mol  
24
26th Energy Level
702.00 kJ/mol  
29
650.90 kJ/mol  
35
27th Energy Level
702.00 kJ/mol  
30
650.90 kJ/mol  
36
28th Energy Level
702.00 kJ/mol  
35
650.90 kJ/mol  
99+
29th Energy Level
702.00 kJ/mol  
36
650.90 kJ/mol  
99+
30th Energy Level
702.00 kJ/mol  
30
650.90 kJ/mol  
38
Electrochemical Equivalent
0.52 g/amp-hr  
99+
0.29 g/amp-hr  
99+
Electron Work Function
4.90 eV  
12
4.10 eV  
32
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Ionization, Radioactive Isotopes  
Atomic
Atomic Number
43  
99+
25  
99+
Electron Configuration
[Kr] 4d5 5s2  
[Ar] 3d5 4s2  
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+
25  
99+
Number of Neutrons
55  
99+
30  
99+
Number of Electrons
43  
99+
25  
99+
Radius of an Atom
  
  
Atomic Radius
136.00 pm  
99+
127.00 pm  
99+
Covalent Radius
147.00 pm  
39
139.00 pm  
99+
Van der Waals Radius
200.00 pm  
35
200.00 pm  
35
Atomic Weight
98.00 amu  
99+
54.94 amu  
99+
Atomic Volume
8.50 cm3/mol  
99+
1.39 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Molybdenum
  
Chromium
  
Next Element
Ruthenium
  
Iron
  
Valence Electron Potential
180.00 (-eV)  
3
220.00 (-eV)  
2
Lattice Constant
273.50 pm  
99+
891.25 pm  
1
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, π/2  
Lattice C/A Ratio
1.60  
21
1.55  
99+
Mechanical
Density
  
  
Density At Room Temperature
11.00 g/cm3  
36
7.21 g/cm3  
99+
Density When Liquid (at m.p.)
11.00 g/cm3  
34
5.95 g/cm3  
99+
Tensile Strength
50.00 MPa  
38
370.00 MPa  
11
Viscosity
0.00  
25
0.00  
2
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
12
Vapor Pressure at 2000 K
0.00 (Pa)  
99+
0.00 (Pa)  
30
Elasticity properties
  
  
Shear Modulus
27.00 GPa  
34
40.00 GPa  
19
Bulk Modulus
100.00 GPa  
16
120.00 GPa  
14
Young's Modulus
50.00 GPa  
39
198.00 GPa  
13
Poisson Ratio
0.38  
6
0.30  
14
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
11.50  
37
7.21  
99+
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
7
Susceptibility
0.00  
24
0.00  
12
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
200.00 nΩ·m  
18
1.44 nΩ·m  
99+
Electrical Conductivity
0.07 106/cm Ω  
35
0.01 106/cm Ω  
99+
Electron Affinity
53.00 kJ/mol  
23
0.00 kJ/mol  
99+
Thermal
Specific Heat
0.21 J/(kg K)  
30
0.48 J/(kg K)  
11
Molar Heat Capacity
24.27 J/mol·K  
99+
26.32 J/mol·K  
37
Thermal Conductivity
50.60 W/m·K  
30
7.81 W/m·K  
99+
Critical Temperature
2,150.00 K  
16
1,519.00 K  
40
Thermal Expansion
7.10 µm/(m·K)  
99+
21.70 µm/(m·K)  
22
Enthalpy
  
  
Enthalpy of Vaporization
660.00 kJ/mol  
7
219.70 kJ/mol  
99+
Enthalpy of Fusion
23.01 kJ/mol  
9
14.64 kJ/mol  
25
Enthalpy of Atomization
649.00 kJ/mol  
9
280.30 kJ/mol  
99+
Standard Molar Entropy
181.10 J/mol.K  
2
32.00 J/mol.K  
99+
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