Dubnium
Transition Metal
Dubnium (Db) is a chemical element with atomic number 105, classified as a transition metal. At room temperature it is a solid. It was discovered in 1967 by Lawrence Berkeley Laboratory / JINR.
Properties
- Atomic number
- 105
- Atomic mass
- 268 u
- Category
- Transition Metal
- Group
- 5
- Period
- 7
- Block
- d-block
- Electron configuration
- [Rn] 5f¹⁴ 6d³ 7s²
- Phase at STP
- Solid
- Density
- 29.3 g/cm³
- Melting point
- —
- Boiling point
- —
- Electronegativity
- —
- Atomic radius
- —
- Ionization energy
- —
- Discovery
- 1967 · Lawrence Berkeley Laboratory / JINR
Common uses
Research only
Did you know?
Named after Dubna, Russia where it was studied.