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.
Experiment with the elements
Dubnium doesn't form any compounds in our lab yet, but the periodic table sandbox lets you combine dozens of other real elements into real compounds — water, table salt, ammonia and many more — with their true chemical formulas.