Pb Lead     Atomic number : 82 
    Relative atomic mass (12C = 12.0000) :  207.2 
    P H Y S I C A L     D A T A
Group 14 metal
 
Density / kg m-3 :  11 350 [293 K]; 10 678 [liquid at m.p.]
 
Melting point / K :  600.65 
 
Boiling point / K :  2013
 
    D I S C O V E R Y
Known to ancient civilizations.
 
    G E O L O G I C A L     D A T A
Abundances
 
Sun (relative to H = 1 × 1012) : 85.1
 
Earth's crust / p.p.m. : 14
 
Atmosphere / p.p.m. (volume) : trace
 
Residence time / years : 50
 
Classification : scavenged
 
Oxidation state : II
 
  
 
Seawater / p.p.m. :
    Atlantic surface : 30 × 10-6
    Atlantic deep : 4.0 × 10-6
    Pacific surface : 10 × 10-6
    Pacific deep : 1 × 10-6
    B I O L O G I C A L     D A T A
Level in humans
 
Blood / mg dm-3 : 0.21
 
Bone / p.p.m. : 3.6 - 30
 
Liver / p.p.m. : 3 - 12
 
Muscle / p.p.m. : 0.23 - 3.3
 
  
 
Daily dietary intake : 0.06 - 0.5 mg
 
Total mass of element
in average (70 kg) person :
120 mg (stored in skeleton)

 

NetElements II  

A portrait of lead is available on the Visual Elements site. Up to 200 individual items of information on this element are available in The Elements.


Text copyright John Emsley 1999.   HTML and page layout copyright Simon Hall 1999.
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NetElements II last modified October 27th, 1999