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Bohrium vs Iridium

Bohrium
Iridium
Iridium vs Bohrium


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