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Bohrium vs Osmium

Bohrium
Osmium
Osmium vs Bohrium


Periodic Table
Symbol
Bh  
Os  
Group Number
7  
11
8  
10
Period Number
7  
6  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
54037148  
12
7440042  
99+
Space Group Name
-  
P63/mmc  
Space Group Number
276.00  
1
194.00  
7
Facts
Interesting Facts
  • Bohrium metal is also known as Unnilseptium (Uns) and Nielsbohrium (Ns).
  
  • Osmium metal does not oxidize in air unless it is heated.
  • But if it heated den it forms Osmium Tetroxide, which is highly toxic.
  
Sources
Found in Minerals, Mining, Synthetically Produced  
Found As a By-product, Found in Minerals, Mining  
History
  
  
Who Discovered
Gesellschaft für Schwerionenforschung  
Smithson Tennant  
Discovery
In 1981  
In 1803  
Abundance
  
  
Abundance In Universe
0.00 %  
37
0.00 %  
22
Abundance In Sun
-  
0.00 %  
25
Abundance In Meteorites
0.00 %  
99+
0.00 %  
28
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
99+
Abundance In Oceans
-  
0.00 %  
99+
Abundance In Humans
-  
0.00 %  
24
Uses
Uses & Benefits
  • Currently known uses of Bohrium metal are limited to research purpose only.
  
  • Its has very limited uses and its alloys are very hard and are used in the manufacturing of pen tips, pivots, needles and electrical contacts.
  • It is also used as industrial catalyst to speed up the chemical reaction.
  
Industrial Uses
-  
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
-  
Other Uses
Research Purposes  
Alloys  
Biological Properties
  
  
Toxicity
-  
Highly Toxic  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
37
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
-  
3,045.00 °C  
3
Boiling Point
0.00 °C  
99+
5,027.00 °C  
6
Appearance
  
  
Physical State
Solid  
Solid  
Color
-  
Silvery Bluish-Gray  
Luster
Unknown Luster  
Metallic  
Hardness
  
  
Mohs Hardness
7.00  
3
7.00  
3
Brinell Hardness
270.00 MPa  
99+
3,490.00 MPa  
1
Vickers Hardness
2,700.00 MPa  
4
3,920.00 MPa  
1
Speed of Sound
2,680.00 m/s  
99+
4,940.00 m/s  
15
Optical Properties
  
  
Refractive Index
1.50  
36
2.07  
12
Reflectivity
59.00 %  
24
80.00 %  
7
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Bh  
Os  
Isotopes
  
  
Known Isotopes
5  
32
35  
4
Electronegativity
  
  
Pauling Electronegativity
2.00  
8
2.20  
5
Sanderson Electronegativity
1.30  
25
2.20  
8
Allred Rochow Electronegativity
1.30  
25
1.52  
13
Mulliken-Jaffe Electronegativity
1.30  
33
2.20  
6
Allen Electronegativity
2.00  
6
1.65  
22
Electropositivity
  
  
Pauling Electropositivity
2.00  
99+
1.80  
99+
Ionization Energies
  
  
1st Energy Level
742.90 kJ/mol  
23
840.00 kJ/mol  
12
2nd Energy Level
1,688.50 kJ/mol  
31
1,309.80 kJ/mol  
99+
3rd Energy Level
2,566.50 kJ/mol  
99+
1,600.00 kJ/mol  
99+
4th Energy Level
3,598.90 kJ/mol  
99+
840.00 kJ/mol  
99+
5th Energy Level
4,727.80 kJ/mol  
99+
8,400.00 kJ/mol  
10
6th Energy Level
5,991.70 kJ/mol  
99+
8,400.00 kJ/mol  
30
7th Energy level
7,226.80 kJ/mol  
34
8,400.00 kJ/mol  
25
8th Energy Level
7,100.00 kJ/mol  
33
8,400.00 kJ/mol  
25
9th Energy Level
5,800.00 kJ/mol  
99+
5,280.00 kJ/mol  
99+
10th Energy Level
7,100.00 kJ/mol  
35
8,400.00 kJ/mol  
26
11th Energy Level
8,200.00 kJ/mol  
25
8,400.00 kJ/mol  
23
12th Energy Level
82,700.00 kJ/mol  
4
8,400.00 kJ/mol  
99+
13th Energy Level
7,100.00 kJ/mol  
29
8,400.00 kJ/mol  
18
14th Energy Level
8,200.00 kJ/mol  
17
840.00 kJ/mol  
99+
15th Energy Level
82,000.00 kJ/mol  
14
84,000.00 kJ/mol  
12
16th Energy Level
71,100.00 kJ/mol  
20
840.00 kJ/mol  
99+
17th Energy Level
820.00 kJ/mol  
31
840.00 kJ/mol  
29
18th Energy Level
8,200.00 kJ/mol  
20
8,400.00 kJ/mol  
18
19th Energy Level
820.80 kJ/mol  
28
840.00 kJ/mol  
27
20th Energy Level
820.00 kJ/mol  
21
840.00 kJ/mol  
19
21st Energy Level
8,200.00 kJ/mol  
11
840.00 kJ/mol  
39
22nd Energy Level
820.00 kJ/mol  
16
840.00 kJ/mol  
15
23rd Energy Level
8,200.00 kJ/mol  
8
840.00 kJ/mol  
99+
24th Energy Level
820.00 kJ/mol  
12
840.00 kJ/mol  
11
25th Energy Level
820.00 kJ/mol  
10
840.00 kJ/mol  
9
26th Energy Level
820.00 kJ/mol  
10
840.00 kJ/mol  
9
27th Energy Level
820.00 kJ/mol  
9
713.30 kJ/mol  
24
28th Energy Level
820.00 kJ/mol  
15
840.10 kJ/mol  
13
29th Energy Level
820.00 kJ/mol  
14
840.00 kJ/mol  
13
30th Energy Level
820.00 kJ/mol  
10
840.00 kJ/mol  
9
Electrochemical Equivalent
3.00 g/amp-hr  
21
1.77 g/amp-hr  
99+
Electron Work Function
4.90 eV  
12
4.83 eV  
13
Other Chemical Properties
Ionization, Radioactive Isotopes  
Chemical Stability, Ionization, Solubility  
Atomic
Atomic Number
107  
11
76  
40
Electron Configuration
[Rn] 5f14 6d5 7s2  
[Xe] 4f14 5d6 6s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
107  
11
76  
39
Number of Neutrons
155  
9
114  
26
Number of Electrons
107  
11
76  
39
Radius of an Atom
  
  
Atomic Radius
128.00 pm  
99+
133.80 pm  
99+
Covalent Radius
141.00 pm  
99+
128.00 pm  
99+
Van der Waals Radius
0.00 pm  
99+
216.00 pm  
30
Atomic Weight
270.00 amu  
8
190.23 amu  
35
Atomic Volume
23.70 cm3/mol  
14
8.49 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Seaborgium
  
Rhenium
  
Next Element
Hassium
  
Iridium
  
Valence Electron Potential
27.20 (-eV)  
99+
91.40 (-eV)  
12
Lattice Constant
-  
273.44 pm  
99+
Lattice Angles
-  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.57  
99+
1.58  
37
Mechanical
Density
  
  
Density At Room Temperature
37.10 g/cm3  
3
22.59 g/cm3  
9
Density When Liquid (at m.p.)
37.10 g/cm3  
3
20.00 g/cm3  
11
Tensile Strength
152.00 MPa  
24
1,000.00 MPa  
4
Viscosity
0.00  
25
0.00  
3
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
16
Vapor Pressure at 2000 K
0.00 (Pa)  
37
0.00 (Pa)  
39
Elasticity properties
  
  
Shear Modulus
28.00 GPa  
32
222.00 GPa  
1
Bulk Modulus
37.00 GPa  
99+
462.00 GPa  
1
Young's Modulus
0.00 GPa  
99+
528.00 GPa  
1
Poisson Ratio
0.35  
9
0.25  
24
Other Mechanical Properties
-  
Ductile  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
37.00  
5
22.57  
11
Magnetic Ordering
-  
Paramagnetic  
Permeability
0.00 H/m  
11
0.00 H/m  
17
Susceptibility
0.00  
24
0.00  
17
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
6.50 nΩ·m  
99+
81.20 nΩ·m  
35
Electrical Conductivity
0.00 106/cm Ω  
99+
0.11 106/cm Ω  
21
Electron Affinity
-  
106.10 kJ/mol  
10
Thermal
Specific Heat
0.10 J/(kg K)  
99+
0.13 J/(kg K)  
40
Molar Heat Capacity
37.10 J/mol·K  
2
24.70 J/mol·K  
99+
Thermal Conductivity
37.00 W/m·K  
36
87.60 W/m·K  
19
Critical Temperature
1,323.00 K  
99+
3,300.00 K  
3
Thermal Expansion
14.30 µm/(m·K)  
28
5.10 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
270.50 kJ/mol  
99+
627.60 kJ/mol  
8
Enthalpy of Fusion
-  
29.30 kJ/mol  
4
Enthalpy of Atomization
-  
669.00 kJ/mol  
6
Standard Molar Entropy
57.00 J/mol.K  
30
32.60 J/mol.K  
99+
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