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Technetium vs Magnesium

Technetium
Magnesium
Magnesium vs Technetium


Periodic Table
Symbol
Tc  
Mg  
Group Number
7  
11
2  
16
Period Number
5  
3  
Block
d block  
s block  
Element Family
Transition Metal  
Alkaline Earth  
CAS Number
7440268  
99+
7439954  
99+
Space Group Name
P63/mmc  
P63/mmc  
Space Group Number
194.00  
7
194.00  
7
Facts
Interesting Facts
  • Original name of Technetium was Masurium.
  • At the time of its discovery it found in sample of Molybdenum.
  
  • Magnesium ions are present in every chlorophyll of every green plant .
  • Controlling Magnesium fire by pouring water on it will result in explosions.
  
Sources
Made by Bombarding Molybdenum with Deuterons  
By Electrolysis Process, In Ocean, Mining  
History
  
  
Who Discovered
Emilio Segrè and Carlo Perriero  
Joseph Black  
Discovery
In 1937  
In 1755  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.06 %  
3
Abundance In Sun
0.00 %  
18
0.07 %  
2
Abundance In Meteorites
-  
12.00 %  
2
Abundance In Earth's Crust
0.00 %  
99+
2.90 %  
4
Abundance In Oceans
-  
0.13 %  
2
Abundance In Humans
-  
0.03 %  
5
Uses
Uses & Benefits
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  
  • Magnesium aluminum alloy improves the mechanical strength and welding characteristics and hence it is used in aeroplane and car manufacturing.
  • It is also used to remove sulfur from the molten iron and steel.
  
Industrial Uses
-  
Aerospace Industry, Ammunition Industry, Automobile Industry, Chemical Industry, Pharmaceutical Industry  
Medical Uses
-  
-  
Other Uses
Alloys, Nuclear Research, Research Purposes  
Surgical Instruments Manufacturing  
Biological Properties
  
  
Toxicity
Low Toxic  
Non Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
40
37.80 Blood/mg dm-3  
5
In Bone
0.00 p.p.m.  
99+
1,800.00 p.p.m.  
4
Physical
Melting Point
2,200.00 °C  
9
650.00 °C  
99+
Boiling Point
4,877.00 °C  
7
1,107.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Shiny Gray  
Gray  
Luster
-  
-  
Hardness
  
  
Mohs Hardness
2.25  
16
2.50  
15
Brinell Hardness
550.00 MPa  
27
260.00 MPa  
99+
Vickers Hardness
500.00 MPa  
35
260.00 MPa  
99+
Speed of Sound
16,200.00 m/s  
1
4,940.00 m/s  
15
Optical Properties
  
  
Refractive Index
1.90  
18
1.49  
37
Reflectivity
35.00 %  
34
74.00 %  
9
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Tc  
Mg  
Isotopes
  
  
Known Isotopes
18  
21
15  
24
Electronegativity
  
  
Pauling Electronegativity
1.90  
12
1.31  
32
Sanderson Electronegativity
1.90  
13
1.32  
24
Allred Rochow Electronegativity
1.36  
21
1.23  
26
Mulliken-Jaffe Electronegativity
1.90  
13
1.37  
30
Allen Electronegativity
1.51  
31
1.29  
99+
Electropositivity
  
  
Pauling Electropositivity
2.10  
99+
2.69  
23
Ionization Energies
  
  
1st Energy Level
702.00 kJ/mol  
36
737.70 kJ/mol  
24
2nd Energy Level
1,470.00 kJ/mol  
99+
1,450.70 kJ/mol  
99+
3rd Energy Level
2,850.00 kJ/mol  
34
7,732.70 kJ/mol  
5
4th Energy Level
7,020.00 kJ/mol  
14
10,542.50 kJ/mol  
4
5th Energy Level
7,020.00 kJ/mol  
28
13,630.00 kJ/mol  
3
6th Energy Level
7,020.00 kJ/mol  
99+
18,020.00 kJ/mol  
3
7th Energy level
4,700.00 kJ/mol  
99+
21,711.00 kJ/mol  
3
8th Energy Level
4,700.00 kJ/mol  
99+
25,661.00 kJ/mol  
3
9th Energy Level
7,020.00 kJ/mol  
35
31,653.00 kJ/mol  
3
10th Energy Level
7,020.00 kJ/mol  
39
35,458.00 kJ/mol  
5
11th Energy Level
7,020.00 kJ/mol  
37
169,988.00 kJ/mol  
1
12th Energy Level
7,020.00 kJ/mol  
99+
189,368.00 kJ/mol  
1
13th Energy Level
7,020.00 kJ/mol  
33
7,370.00 kJ/mol  
24
14th Energy Level
7,020.00 kJ/mol  
23
737.70 kJ/mol  
99+
15th Energy Level
70,200.00 kJ/mol  
29
73,700.00 kJ/mol  
21
16th Energy Level
70,200.00 kJ/mol  
24
73,770.00 kJ/mol  
16
17th Energy Level
702.50 kJ/mol  
99+
737.70 kJ/mol  
37
18th Energy Level
7,020.00 kJ/mol  
35
7,370.00 kJ/mol  
27
19th Energy Level
702.00 kJ/mol  
99+
737.70 kJ/mol  
34
20th Energy Level
702.00 kJ/mol  
35
737.00 kJ/mol  
28
21st Energy Level
702.00 kJ/mol  
99+
737.70 kJ/mol  
99+
22nd Energy Level
702.00 kJ/mol  
29
738.00 kJ/mol  
22
23rd Energy Level
702.00 kJ/mol  
99+
737.70 kJ/mol  
99+
24th Energy Level
702.50 kJ/mol  
28
737.70 kJ/mol  
20
25th Energy Level
702.00 kJ/mol  
30
737.70 kJ/mol  
20
26th Energy Level
702.00 kJ/mol  
29
737.70 kJ/mol  
20
27th Energy Level
702.00 kJ/mol  
30
737.70 kJ/mol  
19
28th Energy Level
702.00 kJ/mol  
35
737.70 kJ/mol  
25
29th Energy Level
702.00 kJ/mol  
36
737.70 kJ/mol  
26
30th Energy Level
702.00 kJ/mol  
30
737.70 kJ/mol  
20
Electrochemical Equivalent
0.52 g/amp-hr  
99+
0.45 g/amp-hr  
99+
Electron Work Function
4.90 eV  
12
3.66 eV  
40
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Corrosion, Highly Inflammable, Ionization, Solubility  
Atomic
Atomic Number
43  
99+
12  
99+
Electron Configuration
[Kr] 4d5 5s2  
[Ne] 3s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
HCP-Crystal-Structure-of-Technetium.jpg#100  
HCP-Crystal-Structure-of-Magnesium.jpg#100  
Atom
  
  
Number of Protons
43  
99+
12  
99+
Number of Neutrons
55  
99+
12  
99+
Number of Electrons
43  
99+
12  
99+
Radius of an Atom
  
  
Atomic Radius
136.00 pm  
99+
160.00 pm  
29
Covalent Radius
147.00 pm  
39
141.00 pm  
99+
Van der Waals Radius
200.00 pm  
35
173.00 pm  
99+
Atomic Weight
98.00 amu  
99+
24.31 amu  
99+
Atomic Volume
8.50 cm3/mol  
99+
13.97 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Molybdenum
  
Sodium
  
Next Element
Ruthenium
  
Aluminium
  
Valence Electron Potential
180.00 (-eV)  
3
40.00 (-eV)  
99+
Lattice Constant
273.50 pm  
99+
320.94 pm  
99+
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.60  
21
1.62  
15
Mechanical
Density
  
  
Density At Room Temperature
11.00 g/cm3  
36
1.74 g/cm3  
99+
Density When Liquid (at m.p.)
11.00 g/cm3  
34
1.58 g/cm3  
99+
Tensile Strength
50.00 MPa  
38
150.00 MPa  
25
Viscosity
0.00  
25
0.00  
24
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
22
Vapor Pressure at 2000 K
0.00 (Pa)  
99+
0.00 (Pa)  
30
Elasticity properties
  
  
Shear Modulus
27.00 GPa  
34
17.00 GPa  
99+
Bulk Modulus
100.00 GPa  
16
45.00 GPa  
29
Young's Modulus
50.00 GPa  
39
45.00 GPa  
99+
Poisson Ratio
0.38  
6
0.29  
15
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
11.50  
37
1.74  
99+
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
8
Susceptibility
0.00  
24
0.00  
33
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
200.00 nΩ·m  
18
43.90 nΩ·m  
99+
Electrical Conductivity
0.07 106/cm Ω  
35
0.23 106/cm Ω  
7
Electron Affinity
53.00 kJ/mol  
23
0.00 kJ/mol  
99+
Thermal
Specific Heat
0.21 J/(kg K)  
30
1.02 J/(kg K)  
4
Molar Heat Capacity
24.27 J/mol·K  
99+
24.87 J/mol·K  
99+
Thermal Conductivity
50.60 W/m·K  
30
156.00 W/m·K  
8
Critical Temperature
2,150.00 K  
16
923.00 K  
99+
Thermal Expansion
7.10 µm/(m·K)  
99+
24.80 µm/(m·K)  
15
Enthalpy
  
  
Enthalpy of Vaporization
660.00 kJ/mol  
7
128.70 kJ/mol  
99+
Enthalpy of Fusion
23.01 kJ/mol  
9
8.95 kJ/mol  
99+
Enthalpy of Atomization
649.00 kJ/mol  
9
148.50 kJ/mol  
99+
Standard Molar Entropy
181.10 J/mol.K  
2
32.70 J/mol.K  
99+
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