Molybdenum Properties

Molybdenum

Physical

Melting Point

2,617.00 °C 5

Boiling Point

4,612.00 °C 9

Hardness

Mohs Hardness

5.50 7

Brinell Hardness

1,370.00 MPa 7

Vickers Hardness

1,400.00 MPa 6

Optical Properties

Refractive Index

Not Available 0

Reflectivity

58.00 % 15

Speed of Sound

5,400.00 m/s 6

Allotropes

No 0

α Allotropes

Not Available 0

β Allotropes

Not Available 0

γ Allotropes

Not Available 0

Chemical

Chemical Formula

Mo 0

Isotopes

Known Isotopes

25 14

Electronegativity

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

Pauling Electropositivity

1.84 48

Ionization Energies

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

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

Mechanical

Density

Density At Room Temperature

10.28 g/cm³ 36

Density When Liquid (at m.p.)

9.33 g/cm3 20

Vapor Pressure

Vapor Pressure at 1000 K

Not Available 0

Vapor Pressure at 2000 K

0.00 (Pa) 26

Tensile Strength

324.00 MPa 13

Viscosity

Not Available 0

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 0

Periodic Table

Symbol

Mo 0

Group Number

6 12

Period Number

5 3

Block

d block 0

Element Family

Transition Metal 0

Atomic

Atomic Number

42 70

Atomic Weight

95.95 amu 64

Atomic Volume

9.40 cm3/mol 51

Electron Configuration

[Kr] 4d⁵ 5s¹ 0

Valence Electron Potential

88.60 (-eV) 13

Atom

Number of Protons

42 69

Number of Neutrons

54 52

Number of Electrons

42 69

Crystal Structure

Body Centered Cubic (BCC) 0

Crystal Lattice

BCC-Crystal-Structure-.jpg#100 0

Radius of an Atom

Atomic Radius

139.00 pm 39

Covalent Radius

154.00 pm 32

Van der Waals Radius

200.00 pm 28

Lattice Constant

314.70 pm 57

Lattice Angles

π/2, π/2, π/2 0

Lattice C/A Ratio

Not Available 0

Adjacent Atomic Numbers

Next Element

58 0

Previous Element

62 0

Magnetic

Electrical Properties

Resistivity

53.40 nΩ·m 41

Electrical Conductivity

0.19 10⁶/cm Ω 11

Electron Affinity

71.90 kJ/mol 14

Electrical Property

Semiconductor 0

Magnetic Characteristics

Specific Gravity

10.22 27

Magnetic Ordering

Paramagnetic 0

Permeability

Not Available 0

Susceptibility

Not Available 0

Thermal

Specific Heat

0.25 J/(kg K) 21

Thermal Conductivity

138.00 W/m·K 12

Critical Temperature

Not Available 0

Molar Heat Capacity

24.06 J/mol·K 54

Thermal Expansion

4.80 µm/(m·K) 58

Standard Molar Entropy

28.70 J/mol.K 53

Enthalpy

Enthalpy of Vaporization

594.10 kJ/mol 8

Enthalpy of Fusion

27.61 kJ/mol 5

Enthalpy of Atomization

653.00 kJ/mol 7

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Molybdenum Properties

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