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Molybdenum metal Solid
Symbol: Mo
Atomic number: 42
Atomic mass: 95.94
Group: Transition Metal
CAS-number: 7439-98-7

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Physical data

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Thermal data

 

Steric data

Shells: 2,8,18,13,1
Orbitals: [Kr] 4d5 5s1
Electronegativity: 1.3, 1.8
1. Ionization potential: 7.0924 eV
2. Ionization potential: 16.461 eV
3. Ionization potential: 27.16 eV
Oxidation states: 6,5,4,3,2,0
Electrical conductivity: 0.187 10^6
Melting point: 2617 °C
Boiling point: 4612 °C
Specific heat: 0.25 J/gK
Heat of fusion: 32.0 kJ/mol
Heat of vaporization: 598.0 kJ/mol
Thermal conductivity: 1.38 W/cmK
Atomic radius: 2.01 Å
Ionic radius: 0.59 Å ()
Covalent radius: 1.30 Å
Atomic volume: 9.4 cm³/mol
Density (293 K): 10.2 g/cm³
Crystal structure: Cubic: Body centered
Cubic: Body centered
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Isotopes

NuclideAbundance [%]MassSpinHalflifeDecay modeDecay tree
91Mo0919/215.5mBeta+,ECView
92Mo14.8491.90680--stable--
93Mo092.90625/2~3.5E3yECView
94Mo9.2593.90510--stable--
95Mo15.9294.90585/2--stable--
96Mo16.6895.90470--stable--
97Mo9.5596.9065/2--stable--
98Mo24.1397.90540--stable--
99Mo09912.7476dBeta-,b-View
100Mo9.6397.90750--stable--
101Mo01011/214.6mBeta-View
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Other info

Name origin:Greek: molybdos (lead)
Description:Hard, silvery-white metal.
Discovered by:Carl Wilhelm Scheele
Year:1778
Place:Sweden
Sources:Found in the minerals molybdenite (MoS2) and wulfenite (MoO4Pb).
Use(s):Its alloys are used in aircraft, missiles, and protective coatings in boiler plate.
 
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