Db
Dubnium
Element 105 · 268.126 u
Dubnium's chemistry has been studied using only a few atoms at a time.
Fisiese eienskappe
| Atomic Mass | 268.126 u |
| Density | 29.3 g/cm³ |
| Appearance | Metallic (predicted) |
| Toestand by kamerkomp | Solied |
Chemical Properties
| Oxidation States | +5 |
Atomic Properties
| Electron Configuration | [Rn] 5f14 6d3 7s2 |
Discovery
| Discovered By | Joint Institute for Nuclear Research / Lawrence Berkeley National Laboratory |
| Discovery Year | 1968 |
| Location | Dubna, Russia / Berkeley, USA |
| Genoemde Na | Named after Dubna, Russia |
About Dubnium
Dubnium is a synthetic, radioactive transactinide element. Limited experiments show it behaves somewhat like niobium and tantalum, with some unexpected properties.
Gebruiks & Programme
No practical applications. Scientific research only.
Fun Fact
Chemical experiments on dubnium use only a few atoms at a time, yet scientists found surprising deviations from predicted behavior.
Isotopes
| Definieer Molekulêr Gewigte | Abundance | Half-Life | Stabiel |
| 262 | - | 34 seconds | Nee |
| 268 | - | 1.2 days | Nee |
Electron Configuration
[Rn] 5f14 6d3 7s2