As Arsenic     Atomic number : 33 
    Relative atomic mass (12C = 12.0000) :  74.92159 
    P H Y S I C A L     D A T A
Group 15 non-metal
 
Density / kg m-3 :  5780 (); 4700 () [293 K]
 
Melting point / K :  1090 (alpha, under pressure) 
 
Boiling point / K :  889 (sublimes)
 
    D I S C O V E R Y
Probably first isolated by Albertus Magnus (1193 - 1280).
 
    G E O L O G I C A L     D A T A
Abundances
 
Sun (relative to H = 1 × 1012) : n.a.
 
Earth's crust / p.p.m. : 1.5
 
Atmosphere / p.p.m. (volume) : trace
 
Residence time / years : 90 000
 
Classification : As(III) scavenged, As(V) recycled
 
Oxidation state : III but mainly V
 
  
 
Seawater / p.p.m. :
    Atlantic surface : 1.45 × 10-3
    Atlantic deep : 1.53 × 10-3
    Pacific surface : 1.45 × 10-3
    Pacific deep : 1.75 × 10-3
    B I O L O G I C A L     D A T A
Level in humans
 
Blood / mg dm-3 : 0.0017 - 0.09
 
Bone / p.p.m. : 0.08 - 1.6
 
Liver / p.p.m. : 0.023 - 1.61
 
Muscle / p.p.m. : 0.009 - 0.65
 
  
 
Daily dietary intake : 0.04 - 1.4 mg
 
Total mass of element
in average (70 kg) person :
7 mg (fluctuates over range 0.5 - 1.5 mg depending on diet)

 

NetElements II  

A portrait of arsenic 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