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.
| Db | Dubnium |
Atomic number : 105
Relative atomic mass (12C = 12.0000) : 262.114 (Db-262) |
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| P H Y S I C A L D A T A | |
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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 | |
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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. |
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| G E O L O G I C A L D A T A | |
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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 | |
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Level in humans nil |
Daily dietary intake : nil Total mass of element in average (70 kg) person : nil |
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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. |