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Technetium Iridium Comparison


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   
5
225.00   
2

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
Not Available   
2 * 10-7 %   
22

Abundance In Sun
~-9999 %   
~0.0000002 %   
25

Abundance In Meteorites
Not Available   
0.00 %   
29

Abundance In Earth's Crust
Not Available   
0.00 %   
99+

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
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
Not Available   

In Bone
0.00 p.p.m.   
36
Not Available   

Physical Properties

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
NA   
Metallic   

Hardness
  
  

Mohs Hardness
Not Available   
6.50   
5

Brinell Hardness
Not Available   
1,670.00 MPa   
5

Vickers Hardness
Not Available   
1,760.00 MPa   
3

Speed of Sound
16,200.00 m/s   
1
4,825.00 m/s   
13

Optical Properties
  
  

Reflectivity
Not Available   
78.00 %   
6

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   
Ir   

Isotopes
  
  

Known Isotopes
18   
21
34   
5

Electronegativity
  
  

Pauling Electronegativity
1.90   
11
2.20   
4

Allred Rochow Electronegativity
1.36   
20
1.55   
11

Allen Electronegativity
1.51   
28
1.68   
17

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   
35

3rd Energy Level
2,850.00 kJ/mol   
33
Not Available   

Electrochemical Equivalent
0.52 g/amp-hr   
99+
1.14 g/amp-hr   
99+

Electron Work Function
Not Available   
4.55 eV   
13

Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Flammable, Ionization, Radioactive Isotopes, Radioactivity   

Atomic Properties

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   
27

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   
37
141.00 pm   
99+

Van der Waals Radius
200.00 pm   
28
202.00 pm   
27

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   
26

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
22.56 g/cm3   
10

Density When Liquid (at m.p.)
Not Available   
19.00 g/cm3   
3

Tensile Strength
Not Available   
2,000.00 MPa   
2

Viscosity
Not Available   
Not Available   

Vapor Pressure
  
  

Vapor Pressure at 2000 K
Not Available   
0.00 (Pa)   
25

Elasticity properties
  
  

Shear Modulus
Not Available   
210.00 GPa   
2

Bulk Modulus
Not Available   
320.00 GPa   
3

Young's Modulus
Not Available   
528.00 GPa   
1

Poisson Ratio
Not Available   
0.26   
22

Other Mechanical Properties
NA   
NA   

Magnetic Properties

Magnetic Characteristics
  
  

Specific Gravity
11.50   
24
21.78   
3

Magnetic Ordering
Paramagnetic   
Paramagnetic   

Electrical Properties
  
  

Electrical Property
Conductor   
Conductor   

Resistivity
200.00 nΩ·m   
18
47.10 nΩ·m   
99+

Electrical Conductivity
0.07 106/cm Ω   
30
0.19 106/cm Ω   
10

Electron Affinity
53.00 kJ/mol   
18
151.00 kJ/mol   
4

Thermal Properties

Specific Heat
0.21 J/(kg K)   
29
0.13 J/(kg K)   
39

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
Not Available   
Not Available   

Thermal Expansion
7.10 µm/(m·K)   
99+
6.40 µm/(m·K)   
99+

Enthalpy
  
  

Enthalpy of Vaporization
660.00 kJ/mol   
6
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   
8
837.00 kJ/mol   
1

Standard Molar Entropy
181.10 J/mol.K   
2
35.50 J/mol.K   
99+

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