MolybdenumThis is a featured page



Atomic Number: 42
Atomic Wieght:95.94
Group Number: 6
Period Number: 5
Block: D-block

Molybdenum - Chemistry with Mr. Olson


My Properties
Density of solid [/kg m-3]: 10280
Molar volume [/cm3]: 9.38
Velocity of sound [/m s-1]: 6190
Youngs modulus [/GPa]: 329
Rigidity modulus [/GPa]: 20
Bulk modulus [/GPa]: 230
Poissons ratio [no units]: 0.31
Mineral hardness [no units]: 5.5
Brinell hardness [/MN m-2]: 1500
Vickers hardness [/MN m-2]: 1530
Electrical resistivity [/10-8 Ω m; or mΩ cm]: 5
Reflectivity [/%]: 58


My Home
(Body, Planet, Universe)
Molybdenum is a necessary element, apparently for all species. Only very small amounts are required. Molybdenum plays a role in nitrogen fixation, (a process by which the normally unreactive nitrogen gas is turned into other compounds) enzymes, and nitrate reduction enzymes
Human abundance [/ppb by weight]: 100
Human abundance [/atoms (C = 1000000)]: 7
I am Element!
Molybdenum - Chemistry with Mr. Olson


My Compounds
(My Friends!)
MoF3: molybdenum (III) fluoride
MoF4: molybdenum (IV) fluoride
MoF5: molybdenum (V) fluoride
MoF6: molybdenum (VI) fluoride
MoCl2: molybdenum (II) chloride
MoCl3: molybdenum (III) chloride
MoCl4: molybdenum (IV) chloride
MoCl5: molybdenum (V) chloride
MoCl6: molybdenum (VI) chloride
MoBr2: molybdenum (II) bromide
MoBr3: molybdenum (III) bromide
MoBr4: molybdenum (IV) bromide


molybdenum is available in many forms including foil, sheet, wire, insulated wire, mesh, rod, powder, nanosized activated powder, and tube.


My Jobs
  • valuable alloying agent (contributes to the hardenability and toughness of quenched and tempered steels). Almost all ultra-high strength steels contain molybdenum in amounts from 0.25 to 8%
  • improves the strength of steel at high temperatures
  • electrodes for electrically heated glass furnaces
  • nuclear energy applications
  • missile and aircraft parts
  • valuable catalyst in petroleum refining
  • filament material in electrical applications
  • essential trace element in plant nutrition. Some soils are barren for lack of this element in the soil
  • molybdenum disulphide is a good lubricant, especially at high temperatures where normal oils decompose



History Of Molybdeunum
In 1778 Carl Welhelm Scheele conducted research on an ore now known as molybdenite. He concluded that it did not contain lead as was suspected at the time and reported that the mineral contained a new element that he called molybdenum after the mineral. Molybdenum metal was prepared in an impure form in 1782 by Peter Jacob Hjelm.
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AmandaReed 		Latest page update: made by AmandaReed , Oct 19 2006, 12:42 PM EDT (about this update About This Update AmandaReed Edited by AmandaReed


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