Rf Rutherfordium     Atomic number : 104 
    Relative atomic mass (12C = 12.0000) :  261.11 (Rf-261) 
    P H Y S I C A L     D A T A
Group 4 transition metal
Density / kg m-3 :  23 000 (est.)
Melting point / K :  2400 (est.) 
Boiling point / K :  5800 (est.)
    D I S C O V E R Y
Isotope 260 was reported in 1964 by a group of scientists at Dubna, near Moscow, Russia but the claim was disputed in 1969 by a group of scientists led by A. Ghiorso at Berkeley, California, USA who reported isotope 257. IUPAC concluded in 1992 that credit for the discovery should be shared between both groups.
    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. : nil
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 rutherfordium 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