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What is Molybdenum?
Molybdenum


Periodic Table
0
Symbol
Mo 0
Group Number
6 12
Period Number
5 3
Block
d block 0
Element Family
Transition Metal 0
CAS Number
7439987 80
Space Group Name
Im_ 3m 0
Space Group Number
229.00 1
Facts
0
Interesting Facts
  • Molybdenum is highly reactive metal, hence not found free in nature .
  • Till 18th century Molybdenum element were often mistaken as a carbon or Lead.
0
Sources
Found in Minerals, Mining, Ores of Minerals 0
History
0
Who Discovered
Carl Wilhelm Scheele 0
Discovery
In 1778 0
Abundance
0
Abundance In Universe
5 * 10-7 % 19
Abundance In Sun
~0.0000009 % 19
Abundance In Meteorites
0.00 % 24
Abundance In Earth's Crust
0.00 % 39
Abundance In Oceans
0.00 % 9
Abundance In Humans
0.00 % 14
Uses
0
Uses & Benefits
  • 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.
0
Industrial Uses
Aerospace Industry, Electrical Industry, Electronic Industry 0
Medical Uses
NA 0
Other Uses
Alloys 0
Biological Properties
0
Toxicity
Toxic 0
Present in Human Body
Yes 0
In Blood
0.00 Blood/mg dm-3 31
In Bone
0.70 p.p.m. 18
Physical
0
Melting Point
2,617.00 °C 5
Boiling Point
4,612.00 °C 9
Appearance
0
Physical State
Solid 0
Color
Gray 0
Luster
Metallic 0
Hardness
0
Mohs Hardness
5.50 7
Brinell Hardness
1,370.00 MPa 7
Vickers Hardness
1,400.00 MPa 6
Speed of Sound
5,400.00 m/s 6
Optical Properties
0
Refractive Index
Not Available 0
Reflectivity
58.00 % 15
Allotropes
No 0
α Allotropes
Not Available 0
β Allotropes
Not Available 0
γ Allotropes
Not Available 0
Chemical
0
Chemical Formula
Mo 0
Isotopes
0
Known Isotopes
25 14
Electronegativity
0
Pauling Electronegativity
2.16 5
Sanderson Electronegativity
1.15 19
Allred Rochow Electronegativity
1.30 24
Mulliken-Jaffe Electronegativity
Not Available 0
Allen Electronegativity
2.16 3
Electropositivity
0
Pauling Electropositivity
1.84 48
Ionization Energies
0
1st Energy Level
684.30 kJ/mol 37
2nd Energy Level
1,560.00 kJ/mol 37
3rd Energy Level
2,618.00 kJ/mol 43
4th Energy Level
4,480.00 kJ/mol 26
5th Energy Level
5,257.00 kJ/mol 32
6th Energy Level
6,640.80 kJ/mol 22
7th Energy level
12,125.00 kJ/mol 13
8th Energy Level
13,860.00 kJ/mol 16
9th Energy Level
15,835.00 kJ/mol 16
10th Energy Level
17,980.00 kJ/mol 18
11th Energy Level
20,190.00 kJ/mol 17
12th Energy Level
22,219.00 kJ/mol 15
13th Energy Level
26,930.00 kJ/mol 13
14th Energy Level
29,196.00 kJ/mol 13
15th Energy Level
52,490.00 kJ/mol 7
16th Energy Level
55,000.00 kJ/mol 8
17th Energy Level
61,400.00 kJ/mol 9
18th Energy Level
67,700.00 kJ/mol 9
19th Energy Level
74,000.00 kJ/mol 9
20th Energy Level
80,400.00 kJ/mol 10
21st Energy Level
87,000.00 kJ/mol 9
22nd Energy Level
93,400.00 kJ/mol 7
23rd Energy Level
98,420.00 kJ/mol 6
24th Energy Level
104,400.00 kJ/mol 2
25th Energy Level
121,900.00 kJ/mol 1
26th Energy Level
127,700.00 kJ/mol 1
27th Energy Level
133,800.00 kJ/mol 1
28th Energy Level
139,800.00 kJ/mol 1
29th Energy Level
148,100.00 kJ/mol 1
30th Energy Level
154,500.00 kJ/mol 1
Electrochemical Equivalent
0.89 g/amp-hr 60
Electron Work Function
4.60 eV 12
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility 0
Atomic
0
Atomic Number
42 70
Electron Configuration
[Kr] 4d5 5s1 0
Crystal Structure
Body Centered Cubic (BCC) 0
Crystal Lattice
BCC-Crystal-Structure-.jpg#100 0
Atom
0
Number of Protons
42 69
Number of Neutrons
54 52
Number of Electrons
42 69
Radius of an Atom
0
Atomic Radius
139.00 pm 39
Covalent Radius
154.00 pm 32
Van der Waals Radius
200.00 pm 28
Atomic Weight
95.95 amu 64
Atomic Volume
9.40 cm3/mol 51
Adjacent Atomic Numbers
0
Previous Element
62 0
Next Element
58 0
Valence Electron Potential
88.60 (-eV) 13
Lattice Constant
314.70 pm 57
Lattice Angles
π/2, π/2, π/2 0
Lattice C/A Ratio
Not Available 0
Mechanical
0
Density
0
Density At Room Temperature
10.28 g/cm3 36
Density When Liquid (at m.p.)
9.33 g/cm3 20
Tensile Strength
324.00 MPa 13
Viscosity
Not Available 0
Vapor Pressure
0
Vapor Pressure at 1000 K
Not Available 0
Vapor Pressure at 2000 K
0.00 (Pa) 26
Elasticity properties
0
Shear Modulus
126.00 GPa 8
Bulk Modulus
230.00 GPa 6
Young's Modulus
329.00 GPa 6
Poisson Ratio
0.31 13
Other Mechanical Properties
Ductile, Weldable 0
Magnetic
0
Magnetic Characteristics
0
Specific Gravity
10.22 27
Magnetic Ordering
Paramagnetic 0
Permeability
Not Available 0
Susceptibility
Not Available 0
Electrical Properties
0
Electrical Property
Semiconductor 0
Resistivity
53.40 nΩ·m 41
Electrical Conductivity
0.19 106/cm Ω 11
Electron Affinity
71.90 kJ/mol 14
Thermal
0
Specific Heat
0.25 J/(kg K) 21
Molar Heat Capacity
24.06 J/mol·K 54
Thermal Conductivity
138.00 W/m·K 12
Critical Temperature
Not Available 0
Thermal Expansion
4.80 µm/(m·K) 58
Enthalpy
0
Enthalpy of Vaporization
594.10 kJ/mol 8
Enthalpy of Fusion
27.61 kJ/mol 5
Enthalpy of Atomization
653.00 kJ/mol 7
Standard Molar Entropy
28.70 J/mol.K 53
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