Mo Molybdenum     Atomic number : 42 
    Relative atomic mass (12C = 12.0000) :  95.94 
    P H Y S I C A L     D A T A
Group 6 transition metal
 
Density / kg m-3 :  10 220 [293 K]; 9330 [liquid at m.p.]
 
Melting point / K :  2890 
 
Boiling point / K :  4885
 
    D I S C O V E R Y
Isolated in 1781 by P.J. Hjelm at Uppsala, Sweden.
 
    G E O L O G I C A L     D A T A
Abundances
 
Sun (relative to H = 1 × 1012) : 145
 
Earth's crust / p.p.m. : 1.5
 
Residence time / years : 600 000
 
Classification : accumulating
 
Oxidation state : VI
 
  
 
Seawater / p.p.m. : 0.0100
    B I O L O G I C A L     D A T A
Level in humans
 
Blood / mg dm-3 : c. 0.001
 
Bone / p.p.m. : < 0.7
 
Liver / p.p.m. : 1.3 - 5.8
 
Muscle / p.p.m. : 0.018
 
  
 
Daily dietary intake : 0.05 - 0.35 mg
 
Total mass of element
in average (70 kg) person :
5 mg

 

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NetElements II last modified October 27th, 1999