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Technetium Iridium Comparison

Technetium
Iridium
Iridium Technetium comparison


Periodic Table
Symbol
Tc  
Ir  
Group Number
7  
11
9  
9
Period Number
5  
6  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
7440268  
99+
7439885  
99+
Space Group Name
P63/mmc  
Fm_ 3m  
Space Group Number
194.00  
7
225.00  
3
Facts
Interesting Facts
  • Original name of Technetium was Masurium.
  • At the time of its discovery it found in sample of Molybdenum.
  
  • Iridium element occurs as natural alloys of Platinum and Osmium.
  • Iridium element is known as the most corrosion resistance metal .
  
Sources
Made by Bombarding Molybdenum with Deuterons  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Emilio Segrè and Carlo Perriero  
Smithson Tennant  
Discovery
In 1937  
In 1803  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
23
Abundance In Sun
0.00 %  
18
0.00 %  
25
Abundance In Meteorites
-  
0.00 %  
29
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
99+
Abundance In Oceans
-  
-  
Abundance In Humans
-  
0.00 %  
24
Uses
Uses & Benefits
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  
  • Iridium has an anti corrosion properties and it is used in special alloy with Osmium metal and that alloy is used in pen tips and compass bearings.
  
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
0.00 Blood/mg dm-3  
40
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
2,200.00 °C  
9
2,410.00 °C  
7
Boiling Point
4,877.00 °C  
7
4,527.00 °C  
10
Appearance
  
  
Physical State
Solid  
Solid  
Color
Shiny Gray  
Silvery White  
Luster
-  
Metallic  
Hardness
  
  
Mohs Hardness
2.25  
16
6.50  
5
Brinell Hardness
550.00 MPa  
27
1,670.00 MPa  
5
Vickers Hardness
500.00 MPa  
35
1,760.00 MPa  
8
Speed of Sound
16,200.00 m/s  
1
4,825.00 m/s  
17
Optical Properties
  
  
Refractive Index
1.90  
18
2.40  
7
Reflectivity
35.00 %  
34
78.00 %  
8
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Tc  
Ir  
Isotopes
  
  
Known Isotopes
18  
21
34  
5
Electronegativity
  
  
Pauling Electronegativity
1.90  
12
2.20  
5
Sanderson Electronegativity
1.90  
13
2.20  
8
Allred Rochow Electronegativity
1.36  
21
1.55  
12
Mulliken-Jaffe Electronegativity
1.90  
13
2.20  
6
Allen Electronegativity
1.51  
31
1.68  
20
Electropositivity
  
  
Pauling Electropositivity
2.10  
99+
1.80  
99+
Ionization Energies
  
  
1st Energy Level
702.00 kJ/mol  
36
880.00 kJ/mol  
9
2nd Energy Level
1,470.00 kJ/mol  
99+
1,600.00 kJ/mol  
36
3rd Energy Level
2,850.00 kJ/mol  
34
2,256.10 kJ/mol  
99+
4th Energy Level
7,020.00 kJ/mol  
14
880.00 kJ/mol  
99+
5th Energy Level
7,020.00 kJ/mol  
28
8,800.00 kJ/mol  
8
6th Energy Level
7,020.00 kJ/mol  
99+
8,800.00 kJ/mol  
25
7th Energy level
4,700.00 kJ/mol  
99+
8,800.00 kJ/mol  
22
8th Energy Level
4,700.00 kJ/mol  
99+
8,800.00 kJ/mol  
22
9th Energy Level
7,020.00 kJ/mol  
35
8,800.00 kJ/mol  
21
10th Energy Level
7,020.00 kJ/mol  
39
8,800.00 kJ/mol  
23
11th Energy Level
7,020.00 kJ/mol  
37
8,800.00 kJ/mol  
20
12th Energy Level
7,020.00 kJ/mol  
99+
8,800.00 kJ/mol  
40
13th Energy Level
7,020.00 kJ/mol  
33
8,800.00 kJ/mol  
15
14th Energy Level
7,020.00 kJ/mol  
23
8,800.00 kJ/mol  
14
15th Energy Level
70,200.00 kJ/mol  
29
88,000.00 kJ/mol  
8
16th Energy Level
70,200.00 kJ/mol  
24
88,000.00 kJ/mol  
9
17th Energy Level
702.50 kJ/mol  
99+
880.00 kJ/mol  
26
18th Energy Level
7,020.00 kJ/mol  
35
8,800.00 kJ/mol  
15
19th Energy Level
702.00 kJ/mol  
99+
880.00 kJ/mol  
24
20th Energy Level
702.00 kJ/mol  
35
880.00 kJ/mol  
14
21st Energy Level
702.00 kJ/mol  
99+
880.00 kJ/mol  
37
22nd Energy Level
702.00 kJ/mol  
29
880.00 kJ/mol  
12
23rd Energy Level
702.00 kJ/mol  
99+
8,800.00 kJ/mol  
7
24th Energy Level
702.50 kJ/mol  
28
880.00 kJ/mol  
8
25th Energy Level
702.00 kJ/mol  
30
880.00 kJ/mol  
6
26th Energy Level
702.00 kJ/mol  
29
880.00 kJ/mol  
6
27th Energy Level
702.00 kJ/mol  
30
880.00 kJ/mol  
5
28th Energy Level
702.00 kJ/mol  
35
880.00 kJ/mol  
8
29th Energy Level
702.00 kJ/mol  
36
880.00 kJ/mol  
9
30th Energy Level
702.00 kJ/mol  
30
880.00 kJ/mol  
6
Electrochemical Equivalent
0.52 g/amp-hr  
99+
1.14 g/amp-hr  
99+
Electron Work Function
4.90 eV  
12
4.55 eV  
18
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Flammable, Ionization, Radioactive Isotopes, Radioactivity  
Atomic
Atomic Number
43  
99+
77  
39
Electron Configuration
[Kr] 4d5 5s2  
[Xe] 4f14 5d7 6s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Face Centered Cubic (FCC)  
Crystal Lattice
HCP-Crystal-Structure-of-Technetium.jpg#100  
FCC-Crystal-Structure-of-Iridium.jpg#100  
Atom
  
  
Number of Protons
43  
99+
74  
99+
Number of Neutrons
55  
99+
110  
28
Number of Electrons
43  
99+
74  
99+
Radius of an Atom
  
  
Atomic Radius
136.00 pm  
99+
136.00 pm  
99+
Covalent Radius
147.00 pm  
39
141.00 pm  
99+
Van der Waals Radius
200.00 pm  
35
202.00 pm  
34
Atomic Weight
98.00 amu  
99+
192.22 amu  
34
Atomic Volume
8.50 cm3/mol  
99+
9.53 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Molybdenum
  
Osmium
  
Next Element
Ruthenium
  
Platinum
  
Valence Electron Potential
180.00 (-eV)  
3
140.00 (-eV)  
5
Lattice Constant
273.50 pm  
99+
383.90 pm  
29
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, π/2  
Lattice C/A Ratio
1.60  
21
1.58  
35
Mechanical
Density
  
  
Density At Room Temperature
11.00 g/cm3  
36
22.56 g/cm3  
10
Density When Liquid (at m.p.)
11.00 g/cm3  
34
19.00 g/cm3  
13
Tensile Strength
50.00 MPa  
38
2,000.00 MPa  
2
Viscosity
0.00  
25
0.00  
21
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
99+
0.00 (Pa)  
26
Elasticity properties
  
  
Shear Modulus
27.00 GPa  
34
210.00 GPa  
2
Bulk Modulus
100.00 GPa  
16
320.00 GPa  
3
Young's Modulus
50.00 GPa  
39
528.00 GPa  
1
Poisson Ratio
0.38  
6
0.26  
22
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
11.50  
37
21.78  
12
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
16
Susceptibility
0.00  
24
0.00  
5
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
200.00 nΩ·m  
18
47.10 nΩ·m  
99+
Electrical Conductivity
0.07 106/cm Ω  
35
0.19 106/cm Ω  
10
Electron Affinity
53.00 kJ/mol  
23
151.00 kJ/mol  
4
Thermal
Specific Heat
0.21 J/(kg K)  
30
0.13 J/(kg K)  
40
Molar Heat Capacity
24.27 J/mol·K  
99+
25.10 J/mol·K  
99+
Thermal Conductivity
50.60 W/m·K  
30
147.00 W/m·K  
10
Critical Temperature
2,150.00 K  
16
2,719.00 K  
8
Thermal Expansion
7.10 µm/(m·K)  
99+
6.40 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
660.00 kJ/mol  
7
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  
9
837.00 kJ/mol  
1
Standard Molar Entropy
181.10 J/mol.K  
2
35.50 J/mol.K  
99+
Summary >>
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