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Iridium vs Bohrium

Iridium
Bohrium
Bohrium vs Iridium


Periodic Table
Symbol
Ir  
Bh  
Group Number
9  
9
7  
11
Period Number
6  
7  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
7439885  
99+
54037148  
12
Space Group Name
Fm_ 3m  
-  
Space Group Number
225.00  
3
276.00  
1
Facts
Interesting Facts
  • Iridium element occurs as natural alloys of Platinum and Osmium.
  • Iridium element is known as the most corrosion resistance metal .
  
  • Bohrium metal is also known as Unnilseptium (Uns) and Nielsbohrium (Ns).
  
Sources
Found in Minerals, Mining, Ores of Minerals  
Found in Minerals, Mining, Synthetically Produced  
History
  
  
Who Discovered
Smithson Tennant  
Gesellschaft für Schwerionenforschung  
Discovery
In 1803  
In 1981  
Abundance
  
  
Abundance In Universe
0.00 %  
23
0.00 %  
37
Abundance In Sun
0.00 %  
25
-  
Abundance In Meteorites
0.00 %  
29
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
99+
Abundance In Oceans
-  
-  
Abundance In Humans
0.00 %  
24
-  
Uses
Uses & Benefits
  • 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.
  
  • Currently known uses of Bohrium metal are limited to research purpose only.
  
Industrial Uses
Automobile Industry, Electrical Industry, Electronic Industry  
-  
Medical Uses
-  
-  
Other Uses
Alloys  
Research Purposes  
Biological Properties
  
  
Toxicity
Toxic  
-  
Present in Human Body
Yes  
No  
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
2,410.00 °C  
7
-  
Boiling Point
4,527.00 °C  
10
0.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
-  
Luster
Metallic  
Unknown Luster  
Hardness
  
  
Mohs Hardness
6.50  
5
7.00  
3
Brinell Hardness
1,670.00 MPa  
5
270.00 MPa  
99+
Vickers Hardness
1,760.00 MPa  
8
2,700.00 MPa  
4
Speed of Sound
4,825.00 m/s  
17
2,680.00 m/s  
99+
Optical Properties
  
  
Refractive Index
2.40  
7
1.50  
36
Reflectivity
78.00 %  
8
59.00 %  
24
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ir  
Bh  
Isotopes
  
  
Known Isotopes
34  
5
5  
32
Electronegativity
  
  
Pauling Electronegativity
2.20  
5
2.00  
8
Sanderson Electronegativity
2.20  
8
1.30  
25
Allred Rochow Electronegativity
1.55  
12
1.30  
25
Mulliken-Jaffe Electronegativity
2.20  
6
1.30  
33
Allen Electronegativity
1.68  
20
2.00  
6
Electropositivity
  
  
Pauling Electropositivity
1.80  
99+
2.00  
99+
Ionization Energies
  
  
1st Energy Level
880.00 kJ/mol  
9
742.90 kJ/mol  
23
2nd Energy Level
1,600.00 kJ/mol  
36
1,688.50 kJ/mol  
31
3rd Energy Level
2,256.10 kJ/mol  
99+
2,566.50 kJ/mol  
99+
4th Energy Level
880.00 kJ/mol  
99+
3,598.90 kJ/mol  
99+
5th Energy Level
8,800.00 kJ/mol  
8
4,727.80 kJ/mol  
99+
6th Energy Level
8,800.00 kJ/mol  
25
5,991.70 kJ/mol  
99+
7th Energy level
8,800.00 kJ/mol  
22
7,226.80 kJ/mol  
34
8th Energy Level
8,800.00 kJ/mol  
22
7,100.00 kJ/mol  
33
9th Energy Level
8,800.00 kJ/mol  
21
5,800.00 kJ/mol  
99+
10th Energy Level
8,800.00 kJ/mol  
23
7,100.00 kJ/mol  
35
11th Energy Level
8,800.00 kJ/mol  
20
8,200.00 kJ/mol  
25
12th Energy Level
8,800.00 kJ/mol  
40
82,700.00 kJ/mol  
4
13th Energy Level
8,800.00 kJ/mol  
15
7,100.00 kJ/mol  
29
14th Energy Level
8,800.00 kJ/mol  
14
8,200.00 kJ/mol  
17
15th Energy Level
88,000.00 kJ/mol  
8
82,000.00 kJ/mol  
14
16th Energy Level
88,000.00 kJ/mol  
9
71,100.00 kJ/mol  
20
17th Energy Level
880.00 kJ/mol  
26
820.00 kJ/mol  
31
18th Energy Level
8,800.00 kJ/mol  
15
8,200.00 kJ/mol  
20
19th Energy Level
880.00 kJ/mol  
24
820.80 kJ/mol  
28
20th Energy Level
880.00 kJ/mol  
14
820.00 kJ/mol  
21
21st Energy Level
880.00 kJ/mol  
37
8,200.00 kJ/mol  
11
22nd Energy Level
880.00 kJ/mol  
12
820.00 kJ/mol  
16
23rd Energy Level
8,800.00 kJ/mol  
7
8,200.00 kJ/mol  
8
24th Energy Level
880.00 kJ/mol  
8
820.00 kJ/mol  
12
25th Energy Level
880.00 kJ/mol  
6
820.00 kJ/mol  
10
26th Energy Level
880.00 kJ/mol  
6
820.00 kJ/mol  
10
27th Energy Level
880.00 kJ/mol  
5
820.00 kJ/mol  
9
28th Energy Level
880.00 kJ/mol  
8
820.00 kJ/mol  
15
29th Energy Level
880.00 kJ/mol  
9
820.00 kJ/mol  
14
30th Energy Level
880.00 kJ/mol  
6
820.00 kJ/mol  
10
Electrochemical Equivalent
1.14 g/amp-hr  
99+
3.00 g/amp-hr  
21
Electron Work Function
4.55 eV  
18
4.90 eV  
12
Other Chemical Properties
Flammable, Ionization, Radioactive Isotopes, Radioactivity  
Ionization, Radioactive Isotopes  
Atomic
Atomic Number
77  
39
107  
11
Electron Configuration
[Xe] 4f14 5d7 6s2  
[Rn] 5f14 6d5 7s2  
Crystal Structure
Face Centered Cubic (FCC)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
FCC-Crystal-Structure-of-Iridium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
74  
99+
107  
11
Number of Neutrons
110  
28
155  
9
Number of Electrons
74  
99+
107  
11
Radius of an Atom
  
  
Atomic Radius
136.00 pm  
99+
128.00 pm  
99+
Covalent Radius
141.00 pm  
99+
141.00 pm  
99+
Van der Waals Radius
202.00 pm  
34
0.00 pm  
99+
Atomic Weight
192.22 amu  
34
270.00 amu  
8
Atomic Volume
9.53 cm3/mol  
99+
23.70 cm3/mol  
14
Adjacent Atomic Numbers
  
  
Previous Element
Osmium
  
Seaborgium
  
Next Element
Platinum
  
Hassium
  
Valence Electron Potential
140.00 (-eV)  
5
27.20 (-eV)  
99+
Lattice Constant
383.90 pm  
29
-  
Lattice Angles
π/2, π/2, π/2  
-  
Lattice C/A Ratio
1.58  
35
1.57  
99+
Mechanical
Density
  
  
Density At Room Temperature
22.56 g/cm3  
10
37.10 g/cm3  
3
Density When Liquid (at m.p.)
19.00 g/cm3  
13
37.10 g/cm3  
3
Tensile Strength
2,000.00 MPa  
2
152.00 MPa  
24
Viscosity
0.00  
21
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
26
0.00 (Pa)  
37
Elasticity properties
  
  
Shear Modulus
210.00 GPa  
2
28.00 GPa  
32
Bulk Modulus
320.00 GPa  
3
37.00 GPa  
99+
Young's Modulus
528.00 GPa  
1
0.00 GPa  
99+
Poisson Ratio
0.26  
22
0.35  
9
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
21.78  
12
37.00  
5
Magnetic Ordering
Paramagnetic  
-  
Permeability
0.00 H/m  
16
0.00 H/m  
11
Susceptibility
0.00  
5
0.00  
24
Electrical Properties
  
  
Electrical Property
Conductor  
-  
Resistivity
47.10 nΩ·m  
99+
6.50 nΩ·m  
99+
Electrical Conductivity
0.19 106/cm Ω  
10
0.00 106/cm Ω  
99+
Electron Affinity
151.00 kJ/mol  
4
-  
Thermal
Specific Heat
0.13 J/(kg K)  
40
0.10 J/(kg K)  
99+
Molar Heat Capacity
25.10 J/mol·K  
99+
37.10 J/mol·K  
2
Thermal Conductivity
147.00 W/m·K  
10
37.00 W/m·K  
36
Critical Temperature
2,719.00 K  
8
1,323.00 K  
99+
Thermal Expansion
6.40 µm/(m·K)  
99+
14.30 µm/(m·K)  
28
Enthalpy
  
  
Enthalpy of Vaporization
799.10 kJ/mol  
1
270.50 kJ/mol  
99+
Enthalpy of Fusion
35.23 kJ/mol  
1
-  
Enthalpy of Atomization
837.00 kJ/mol  
1
-  
Standard Molar Entropy
35.50 J/mol.K  
99+
57.00 J/mol.K  
30
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