Fr Francium     Atomic number : 87 
    Relative atomic mass (12C = 12.0000) :  223.0197 (Fr-223) 
    P H Y S I C A L     D A T A
Group 1 alkali metal
Density / kg m-3 :  n.a.
Melting point / K :  300 
Boiling point / K :  950
    D I S C O V E R Y
Discovered in 1939 by Marguerite Perey at Paris, France.
    G E O L O G I C A L     D A T A
Sun (relative to H = 1 × 1012) : n.a.
Earth's crust / p.p.m. : traces
Seawater / p.p.m. : nil
    B I O L O G I C A L     D A T A
Level in humans
Organs: nil
Daily dietary intake : nil
Total mass of element
in average (70 kg) person :


NetElements II  

A portrait of francium 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