Db
Dubnium
Element 105 · 268.126 u
Dubnium's chemistry has been studied using only a few atoms at a time.
Physical Properties
| Atomic Mass | 268.126 u |
| Density | 29.3 g/cm³ |
| Appearance | Metallic (predicted) |
| State at Room Temp | Solid |
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 |
| Named After | 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.
Uses & Applications
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
| Mass Number | Abundance | Half-Life | Stable |
| 262 | - | 34 seconds | No |
| 268 | - | 1.2 days | No |
Electron Configuration
[Rn] 5f14 6d3 7s2