Home
 Compare Metals

Osmium Molybdenum Comparison

Osmium
Molybdenum
Molybdenum Osmium comparison


Periodic Table
Symbol
Os  
Mo  
Group Number
8  
10
6  
12
Period Number
6  
5  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
7440042  
99+
7439987  
99+
Space Group Name
P63/mmc  
Im_ 3m  
Space Group Number
194.00  
7
229.00  
2
Facts
Interesting Facts
  • Osmium metal does not oxidize in air unless it is heated.
  • But if it heated den it forms Osmium Tetroxide, which is highly toxic.
  
  • Molybdenum is highly reactive metal, hence not found free in nature .
  • Till 18th century Molybdenum element were often mistaken as a carbon or Lead.
  
Sources
Found As a By-product, Found in Minerals, Mining  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Smithson Tennant  
Carl Wilhelm Scheele  
Discovery
In 1803  
In 1778  
Abundance
  
  
Abundance In Universe
0.00 %  
22
0.00 %  
20
Abundance In Sun
0.00 %  
25
0.00 %  
19
Abundance In Meteorites
0.00 %  
28
0.00 %  
24
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
39
Abundance In Oceans
0.00 %  
99+
0.00 %  
9
Abundance In Humans
0.00 %  
24
0.00 %  
17
Uses
Uses & Benefits
  • 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.
  
  • Its alloys are used to make engine parts, drills, saw blade, etc.
  • Lubricant additive made up of Molybdenum disulfide is commonly used in the industry. It is also used as a catalyst.
  
Industrial Uses
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry  
Aerospace Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
-  
Other Uses
Alloys  
Alloys  
Biological Properties
  
  
Toxicity
Highly Toxic  
Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
37
0.00 Blood/mg dm-3  
31
In Bone
0.00 p.p.m.  
99+
0.70 p.p.m.  
20
Physical
Melting Point
3,045.00 °C  
3
2,617.00 °C  
5
Boiling Point
5,027.00 °C  
6
4,612.00 °C  
9
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery Bluish-Gray  
Gray  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
7.00  
3
5.50  
7
Brinell Hardness
3,490.00 MPa  
1
1,370.00 MPa  
7
Vickers Hardness
3,920.00 MPa  
1
1,400.00 MPa  
11
Speed of Sound
4,940.00 m/s  
15
5,400.00 m/s  
9
Optical Properties
  
  
Refractive Index
2.07  
12
2.00  
15
Reflectivity
80.00 %  
7
58.00 %  
25
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Os  
Mo  
Isotopes
  
  
Known Isotopes
35  
4
25  
14
Electronegativity
  
  
Pauling Electronegativity
2.20  
5
2.16  
6
Sanderson Electronegativity
2.20  
8
1.15  
34
Allred Rochow Electronegativity
1.52  
13
1.30  
25
Mulliken-Jaffe Electronegativity
2.20  
6
2.16  
7
Allen Electronegativity
1.65  
22
2.16  
3
Electropositivity
  
  
Pauling Electropositivity
1.80  
99+
1.84  
99+
Ionization Energies
  
  
1st Energy Level
840.00 kJ/mol  
12
684.30 kJ/mol  
37
2nd Energy Level
1,309.80 kJ/mol  
99+
1,560.00 kJ/mol  
38
3rd Energy Level
1,600.00 kJ/mol  
99+
2,618.00 kJ/mol  
99+
4th Energy Level
840.00 kJ/mol  
99+
4,480.00 kJ/mol  
36
5th Energy Level
8,400.00 kJ/mol  
10
5,257.00 kJ/mol  
99+
6th Energy Level
8,400.00 kJ/mol  
30
6,640.80 kJ/mol  
99+
7th Energy level
8,400.00 kJ/mol  
25
12,125.00 kJ/mol  
13
8th Energy Level
8,400.00 kJ/mol  
25
13,860.00 kJ/mol  
16
9th Energy Level
5,280.00 kJ/mol  
99+
15,835.00 kJ/mol  
16
10th Energy Level
8,400.00 kJ/mol  
26
17,980.00 kJ/mol  
18
11th Energy Level
8,400.00 kJ/mol  
23
20,190.00 kJ/mol  
17
12th Energy Level
8,400.00 kJ/mol  
99+
22,219.00 kJ/mol  
38
13th Energy Level
8,400.00 kJ/mol  
18
26,930.00 kJ/mol  
13
14th Energy Level
840.00 kJ/mol  
99+
29,196.00 kJ/mol  
13
15th Energy Level
84,000.00 kJ/mol  
12
52,490.00 kJ/mol  
99+
16th Energy Level
840.00 kJ/mol  
99+
55,000.00 kJ/mol  
99+
17th Energy Level
840.00 kJ/mol  
29
61,400.00 kJ/mol  
9
18th Energy Level
8,400.00 kJ/mol  
18
67,700.00 kJ/mol  
9
19th Energy Level
840.00 kJ/mol  
27
74,000.00 kJ/mol  
9
20th Energy Level
840.00 kJ/mol  
19
80,400.00 kJ/mol  
10
21st Energy Level
840.00 kJ/mol  
39
87,000.00 kJ/mol  
9
22nd Energy Level
840.00 kJ/mol  
15
93,400.00 kJ/mol  
7
23rd Energy Level
840.00 kJ/mol  
99+
98,420.00 kJ/mol  
6
24th Energy Level
840.00 kJ/mol  
11
104,400.00 kJ/mol  
2
25th Energy Level
840.00 kJ/mol  
9
121,900.00 kJ/mol  
1
26th Energy Level
840.00 kJ/mol  
9
127,700.00 kJ/mol  
1
27th Energy Level
713.30 kJ/mol  
24
133,800.00 kJ/mol  
1
28th Energy Level
840.10 kJ/mol  
13
139,800.00 kJ/mol  
1
29th Energy Level
840.00 kJ/mol  
13
148,100.00 kJ/mol  
1
30th Energy Level
840.00 kJ/mol  
9
154,500.00 kJ/mol  
1
Electrochemical Equivalent
1.77 g/amp-hr  
99+
0.89 g/amp-hr  
99+
Electron Work Function
4.83 eV  
13
4.60 eV  
17
Other Chemical Properties
Chemical Stability, Ionization, Solubility  
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
76  
40
42  
99+
Electron Configuration
[Xe] 4f14 5d6 6s2  
[Kr] 4d5 5s1  
Crystal Structure
Hexagonal Close Packed (HCP)  
Body Centered Cubic (BCC)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
76  
39
42  
99+
Number of Neutrons
114  
26
54  
99+
Number of Electrons
76  
39
42  
99+
Radius of an Atom
  
  
Atomic Radius
133.80 pm  
99+
139.00 pm  
99+
Covalent Radius
128.00 pm  
99+
154.00 pm  
34
Van der Waals Radius
216.00 pm  
30
200.00 pm  
35
Atomic Weight
190.23 amu  
35
95.95 amu  
99+
Atomic Volume
8.49 cm3/mol  
99+
9.40 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Rhenium
  
Niobium
  
Next Element
Iridium
  
Technetium
  
Valence Electron Potential
91.40 (-eV)  
12
88.60 (-eV)  
13
Lattice Constant
273.44 pm  
99+
314.70 pm  
99+
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, π/2  
Lattice C/A Ratio
1.58  
37
1.03  
99+
Mechanical
Density
  
  
Density At Room Temperature
22.59 g/cm3  
9
10.28 g/cm3  
39
Density When Liquid (at m.p.)
20.00 g/cm3  
11
9.33 g/cm3  
99+
Tensile Strength
1,000.00 MPa  
4
324.00 MPa  
15
Viscosity
0.00  
3
0.00  
5
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
16
0.00 (Pa)  
22
Vapor Pressure at 2000 K
0.00 (Pa)  
39
0.00 (Pa)  
27
Elasticity properties
  
  
Shear Modulus
222.00 GPa  
1
126.00 GPa  
8
Bulk Modulus
462.00 GPa  
1
230.00 GPa  
6
Young's Modulus
528.00 GPa  
1
329.00 GPa  
6
Poisson Ratio
0.25  
24
0.31  
13
Other Mechanical Properties
Ductile  
Ductile, Weldable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
22.57  
11
10.22  
40
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
9
Susceptibility
0.00  
17
0.00  
29
Electrical Properties
  
  
Electrical Property
Conductor  
Semiconductor  
Resistivity
81.20 nΩ·m  
35
53.40 nΩ·m  
99+
Electrical Conductivity
0.11 106/cm Ω  
21
0.19 106/cm Ω  
11
Electron Affinity
106.10 kJ/mol  
10
71.90 kJ/mol  
16
Thermal
Specific Heat
0.13 J/(kg K)  
40
0.25 J/(kg K)  
21
Molar Heat Capacity
24.70 J/mol·K  
99+
24.06 J/mol·K  
99+
Thermal Conductivity
87.60 W/m·K  
19
138.00 W/m·K  
12
Critical Temperature
3,300.00 K  
3
2,896.00 K  
6
Thermal Expansion
5.10 µm/(m·K)  
99+
4.80 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
627.60 kJ/mol  
8
594.10 kJ/mol  
9
Enthalpy of Fusion
29.30 kJ/mol  
4
27.61 kJ/mol  
5
Enthalpy of Atomization
669.00 kJ/mol  
6
653.00 kJ/mol  
7
Standard Molar Entropy
32.60 J/mol.K  
99+
28.70 J/mol.K  
99+
Summary >>
<< Thermal

Compare Transition Metals

Transition Metals

Transition Metals

» More Transition Metals

Compare Transition Metals

» More Compare Transition Metals
Home | About | Contact | Disclaimer | Terms of use
© A softusvista inc. venture!