| Db | Dubnium | Atomic number : 105 Relative atomic mass (12C = 12.0000) : 262.114 (Db-262) |
|||||||
| P H Y S I C A L D A T A | |
| Group 5 transition metal Density / kg m-3 : 29 000 |
Melting point / K : n.a. Boiling point / K : n.a. |
| D I S C O V E R Y | |
| Isotopes 260 and 261 were tentatively reported in 1967 by a group of scientists at Dubna, near Moscow, Russio. Isotope 260 was confirmed at both Berkeley, California, USA and Dubna in 1970. |
|
| 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 dubnium is available on the Visual Elements site. Up to 200 individual items of information on this element are available in The Elements. |