Overview |
Name | Molybdenum |
Symbol | Mo |
Atomic Number | 42 |
Atomic Weight | 95.95 |
Density | 10.28 g/cm3 |
Melting Point | 2623 °C |
Boiling Point | 4639 °C |
Thermal properties |
Phase | Solid |
Melting Point | 2623 °C |
Boiling Point | 4639 °C |
Absolute Melting Point | 2896 K |
Absolute Boiling Point | 4912 K |
Critical Pressure | N/A |
Critical Temperature | N/A |
Heat of Fusion | 36 kJ/mol |
Heat of Vaporization | 600 kJ/mol |
Specific Heat | 251 J/(kg K)[note] |
Adiabatic Index | N/A |
Neel Point | N/A |
Thermal Conductivity | 139 W/(m K) |
Thermal Expansion | 4.8×10-6 K-1 |
Bulk physical properties |
Density | 10.28 g/cm3 |
Density (Liquid) | 9.33 g/cm3 |
Molar Volume | 9.334×10-6 |
Brinell Hardness | 1500 MPa |
Mohs Hardness | 5.5 |
Vickers Hardness | 1530 MPa |
Bulk Modulus | 230 GPa |
Shear Modulus | 20 GPa |
Young Modulus | 329 GPa |
Poisson Ratio | 0.31 |
Refractive Index | N/A |
Speed of Sound | 6190 m/s |
Thermal Conductivity | 139 W/(m K) |
Thermal Expansion | 4.8×10-6 K-1 |
Reactivity |
Valence | 6 |
Electronegativity | 2.16 |
ElectronAffinity | 71.9 kJ/mol |
Ionization Energies | 684.3, 1560, 2618, 4480, 5257, 6640.8, 12125, 13860, 15835, 17980, 20190, 22219, 26930, 29196, 52490, 55000, 61400, 67700, 74000, 80400, 87000 kJ/mol |
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Health and Safety |
DOT Hazard Class | |
DOT Numbers | 3089 |
RTECS Number | |
NFPA Label | |
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Classifications |
Alternate Names | None |
Names of Allotropes | None |
Block | d |
Group | 6 |
Period | 5 |
Series | Transition Metal |
Electron Configuration | [Kr]5s14d5 |
Color | Gray |
Discovery | |
Gas phase | N/A |
CAS Number | CAS7439-98-7 |
CID Number | |
RTECS Number | |
Electrical properties |
Electrical Type | Conductor |
Electrical Conductivity | 2×107 S/m |
Resistivity | 4.999999999997×10-8 m Ω |
Superconducting Point | 0.915 |
Magnetic properties |
Magnetic Type | Paramagnetic |
Curie Point | N/A |
Mass Magnetic Susceptibility | 1.17×10-8 m3/Kg |
Molar Magnetic Susceptibility | 1.122×10-9 m3/mol |
Volume Magnetic Susceptibility | 0.0001203 |
Abundances |
% in Universe | 5×10-7% |
% in Sun | 9×10-7% |
% in Meteorites | 0.00012% |
% in Earth's Crust | 0.00011% |
% in Oceans | 9.9×10-7% |
% in Humans | 0.00001% |
Atomic dimensions and structure |
Atomic Radius | 190 pm |
Covalent Radius | 154 pm |
Van der Waals Radius | N/A |
Crystal Structure | Body-centered Cubic |
Lattice Angles | |
Lattice Constants | |
Space Group Name | Im_
3m |
Space Group Number | 229 |
Nuclear Properties |
Half-Life | Stable |
Lifetime | Stable |
Decay Mode | N/A |
Quantum Numbers | 7S3 |
Neutron Cross Section | 2.6 |
Neutron Mass Absorption | 0.0009 |
Known Isotopes | 83Mo, 84Mo, 85Mo, 86Mo, 87Mo, 88Mo, 89Mo, 90Mo, 91Mo, 92Mo, 93Mo, 94Mo, 95Mo, 96Mo, 97Mo, 98Mo, 99Mo, 100Mo, 101Mo, 102Mo, 103Mo, 104Mo, 105Mo, 106Mo, 107Mo, 108Mo, 109Mo, 110Mo, 111Mo, 112Mo, 113Mo, 114Mo, 115Mo |
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Stable Isotopes | |
Isotopic Abundances | |
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