Cl Chlorine     Atomic number : 17 
    Relative atomic mass (12C = 12.0000) :  35.4527 
    P H Y S I C A L     D A T A
Group 17 non-metal
 
Density / kg m-3 :  2030 [113 K]; 1507 [239 K]; 3.214 [273 K]
 
Melting point / K :  172.17 
 
Boiling point / K :  239.18
 
    D I S C O V E R Y
Discovered in 1774 by C.W. Scheele at Uppsala, Sweden.
 
    G E O L O G I C A L     D A T A
Abundances
 
Sun (relative to H = 1 × 1012) : 3.2 × 105
 
Earth's crust / p.p.m. : 130
 
Atmosphere / p.p.m. (volume) : traces as organochlorine compounds
 
Residence time / years : 4 × 108
 
Classification : accumulating
 
Oxidation state : -I
 
  
 
Seawater / p.p.m. : 18 000
    B I O L O G I C A L     D A T A
Level in humans
 
Blood / mg dm-3 : 2890 (chloride)
 
Bone / p.p.m. : 900 (chloride)
 
Liver / p.p.m. : 3000 - 7200 (chloride)
 
Muscle / p.p.m. : 2000 - 5200 (chloride)
 
  
 
Daily dietary intake : 3.00 - 6.50 g
 
Total mass of element
in average (70 kg) person :
95 g

 

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


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NetElements II last modified October 27th, 1999