Quick Facts
| Property | Value |
|---|---|
| Symbol | Db |
| Atomic Number | 105 |
| Atomic Mass | [268] u |
| Category | Transition Metal |
| Period | 7 |
| Group | 5 |
| Block | d |
| Electron Configuration | [Rn] 5f¹⁴ 6d³ 7s² |
History and Discovery
Discovered by: JINR (Dubna) and LBNL (Berkeley) Year of Discovery: 1968-1970 (disputed) Location: Russia and USA
Etymology
Named after Dubna, Russia, location of JINR.
Interesting Facts
- Named after Dubna, Russia
- Discovery disputed during Cold War
- Predicted to behave like tantalum
- Most stable isotope has 28-hour half-life
- Only a few atoms produced at a time