At Astatine     Atomic number : 85 
    Relative atomic mass (12C = 12.0000) :  209.9871 (At-210) 
    P H Y S I C A L     D A T A
Group 17 non-metal
Density / kg m-3 :  n.a.
Melting point / K :  575 (est.) 
Boiling point / K :  610 (est.)
    D I S C O V E R Y
Astatine was first produced in 1940 by D.R. Corson, K.R. Mackenzie, and E. Segré at the University of California, Berkeley, USA.
    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 in some minerals
Seawater / p.p.m. : nil
    B I O L O G I C A L     D A T A
Level in humans
Daily dietary intake : nil
Total mass of element
in average (70 kg) person :


NetElements II  

A portrait of astatine 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.
Unauthorised reproduction of any aspect of this site is strictly prohibited.
NetElements II last modified October 27th, 1999