| 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 | |
| Abundances 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 nil |
Daily dietary intake : nil Total mass of element in average (70 kg) person : nil |
 |
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. |