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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   
5
217.00   
4
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
Not Available   
8 * 10-4 %   
8
Abundance In Sun
~-9999 %   
~0.001 %   
8
Abundance In Meteorites
Not Available   
0.27 %   
8
Abundance In Earth's Crust
Not Available   
0.11 %   
8
Abundance In Oceans
Not Available   
0.00 %   
13
Abundance In Humans
Not Available   
0.00 %   
13
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
NA   
Automobile 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
0.08 Blood/mg dm-3   
14
In Bone
0.00 p.p.m.   
36
100.00 p.p.m.   
8
Physical Properties
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
NA   
Metallic   
Hardness
  
  
Mohs Hardness
Not Available   
6.00   
6
Brinell Hardness
Not Available   
196.00 MPa   
99+
Speed of Sound
16,200.00 m/s   
1
5,150.00 m/s   
7
Optical Properties
  
  
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   
Mn   
Isotopes
  
  
Known Isotopes
18   
21
21   
18
Electronegativity
  
  
Pauling Electronegativity
1.90   
11
1.55   
25
Sanderson Electronegativity
Not Available   
2.20   
7
Allred Rochow Electronegativity
1.36   
20
1.60   
9
Allen Electronegativity
1.51   
28
1.75   
15
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   
39
3rd Energy Level
2,850.00 kJ/mol   
33
3,248.00 kJ/mol   
21
4th Energy Level
Not Available   
4,940.00 kJ/mol   
20
5th Energy Level
Not Available   
6,990.00 kJ/mol   
17
6th Energy Level
Not Available   
9,220.00 kJ/mol   
16
7th Energy level
Not Available   
11,500.00 kJ/mol   
16
8th Energy Level
Not Available   
18,770.00 kJ/mol   
5
9th Energy Level
Not Available   
21,400.00 kJ/mol   
6
10th Energy Level
Not Available   
23,960.00 kJ/mol   
9
11th Energy Level
Not Available   
27,590.00 kJ/mol   
10
12th Energy Level
Not Available   
30,330.00 kJ/mol   
10
13th Energy Level
Not Available   
33,150.00 kJ/mol   
11
14th Energy Level
Not Available   
38,880.00 kJ/mol   
10
15th Energy Level
Not Available   
41,987.00 kJ/mol   
13
16th Energy Level
Not Available   
109,480.00 kJ/mol   
1
17th Energy Level
Not Available   
118,100.00 kJ/mol   
2
18th Energy Level
Not Available   
127,100.00 kJ/mol   
3
19th Energy Level
Not Available   
138,600.00 kJ/mol   
4
20th Energy Level
Not Available   
148,500.00 kJ/mol   
6
21st Energy Level
Not Available   
158,600.00 kJ/mol   
6
22nd Energy Level
Not Available   
172,500.00 kJ/mol   
5
23rd Energy Level
Not Available   
181,380.00 kJ/mol   
5
Electrochemical Equivalent
0.52 g/amp-hr   
99+
0.29 g/amp-hr   
99+
Electron Work Function
Not Available   
4.10 eV   
25
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Ionization, Radioactive Isotopes   
Atomic Properties
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   
37
139.00 pm   
99+
Van der Waals Radius
200.00 pm   
28
200.00 pm   
28
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   
5
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
11.00 g/cm3   
34
7.21 g/cm3   
99+
Density When Liquid (at m.p.)
Not Available   
5.95 g/cm3   
99+
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available   
0.00 (Pa)   
12
Elasticity properties
  
  
Bulk Modulus
Not Available   
120.00 GPa   
14
Young's Modulus
Not Available   
198.00 GPa   
12
Poisson Ratio
Not Available   
Not Available   
Other Mechanical Properties
NA   
NA   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
11.50   
24
7.21   
99+
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Conductor   
Resistivity
200.00 nΩ·m   
18
1.44 nΩ·m   
99+
Electrical Conductivity
0.07 106/cm Ω   
30
0.01 106/cm Ω   
99+
Electron Affinity
53.00 kJ/mol   
18
0.00 kJ/mol   
40
Thermal Properties
Specific Heat
0.21 J/(kg K)   
29
0.48 J/(kg K)   
11
Molar Heat Capacity
24.27 J/mol·K   
99+
26.32 J/mol·K   
29
Thermal Conductivity
50.60 W/m·K   
30
7.81 W/m·K   
99+
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
7.10 µm/(m·K)   
99+
21.70 µm/(m·K)   
21
Enthalpy
  
  
Enthalpy of Vaporization
660.00 kJ/mol   
6
219.70 kJ/mol   
99+
Enthalpy of Fusion
23.01 kJ/mol   
9
14.64 kJ/mol   
23
Enthalpy of Atomization
649.00 kJ/mol   
8
280.30 kJ/mol   
38
Standard Molar Entropy
181.10 J/mol.K   
2
32.00 J/mol.K   
99+
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