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Mo Element
Molybdenum


Periodic Table
Symbol
Mo
Group Number
6 12
Period Number
5 3
Block
d block
Element Family
Transition Metal
CAS Number
7439987 80
Space Group Name
Im_ 3m
Space Group Number
229.00 2
Facts
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.
Sources
Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Carl Wilhelm Scheele
Discovery
In 1778
Abundance
Abundance In Universe
0.00 % 20
Abundance In Sun
0.00 % 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 % 17
Uses
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.
Industrial Uses
Aerospace Industry, Electrical Industry, Electronic Industry
Medical Uses
-
Other Uses
Alloys
Biological Properties
Toxicity
Toxic
Present in Human Body
Yes
In Blood
0.00 Blood/mg dm-3 31
In Bone
0.70 p.p.m. 20
Physical
Melting Point
2,617.00 °C 5
Boiling Point
4,612.00 °C 9
Appearance
Physical State
Solid
Color
Gray
Luster
Metallic
Hardness
Mohs Hardness
5.50 7
Brinell Hardness
1,370.00 MPa 7
Vickers Hardness
1,400.00 MPa 11
Speed of Sound
5,400.00 m/s 9
Optical Properties
Refractive Index
2.00 15
Reflectivity
58.00 % 25
Allotropes
No
α Allotropes
-
β Allotropes
-
γ Allotropes
-
Chemical
Chemical Formula
Mo
Isotopes
Known Isotopes
25 14
Electronegativity
Pauling Electronegativity
2.16 6
Sanderson Electronegativity
1.15 34
Allred Rochow Electronegativity
1.30 25
Mulliken-Jaffe Electronegativity
2.16 7
Allen Electronegativity
2.16 3
Electropositivity
Pauling Electropositivity
1.84 49
Ionization Energies
1st Energy Level
684.30 kJ/mol 37
2nd Energy Level
1,560.00 kJ/mol 38
3rd Energy Level
2,618.00 kJ/mol 44
4th Energy Level
4,480.00 kJ/mol 36
5th Energy Level
5,257.00 kJ/mol 69
6th Energy Level
6,640.80 kJ/mol 49
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 38
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 68
16th Energy Level
55,000.00 kJ/mol 47
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 64
Electron Work Function
4.60 eV 17
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility
Atomic
Atomic Number
42 70
Electron Configuration
[Kr] 4d5 5s1
Crystal Structure
Body Centered Cubic (BCC)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
Atom
Number of Protons
42 69
Number of Neutrons
54 53
Number of Electrons
42 69
Radius of an Atom
Atomic Radius
139.00 pm 41
Covalent Radius
154.00 pm 34
Van der Waals Radius
200.00 pm 35
Atomic Weight
95.95 amu 64
Atomic Volume
9.40 cm3/mol 69
Adjacent Atomic Numbers
Previous Element
62
Next Element
58
Valence Electron Potential
88.60 (-eV) 13
Lattice Constant
314.70 pm 64
Lattice Angles
π/2, π/2, π/2
Lattice C/A Ratio
1.03 61
Mechanical
Density
Density At Room Temperature
10.28 g/cm3 39
Density When Liquid (at m.p.)
9.33 g/cm3 45
Tensile Strength
324.00 MPa 15
Viscosity
0.00 5
Vapor Pressure
Vapor Pressure at 1000 K
0.00 (Pa) 22
Vapor Pressure at 2000 K
0.00 (Pa) 27
Elasticity properties
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
Magnetic
Magnetic Characteristics
Specific Gravity
10.22 40
Magnetic Ordering
Paramagnetic
Permeability
0.00 H/m 9
Susceptibility
0.00 29
Electrical Properties
Electrical Property
Semiconductor
Resistivity
53.40 nΩ·m 41
Electrical Conductivity
0.19 106/cm Ω 11
Electron Affinity
71.90 kJ/mol 16
Thermal
Specific Heat
0.25 J/(kg K) 21
Molar Heat Capacity
24.06 J/mol·K 63
Thermal Conductivity
138.00 W/m·K 12
Critical Temperature
2,896.00 K 6
Thermal Expansion
4.80 µm/(m·K) 73
Enthalpy
Enthalpy of Vaporization
594.10 kJ/mol 9
Enthalpy of Fusion
27.61 kJ/mol 5
Enthalpy of Atomization
653.00 kJ/mol 7
Standard Molar Entropy
28.70 J/mol.K 70
Summary >>
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