105 Db
Transition metal
Dubnium
Named after Dubna, Russia.
Properties of Dubnium
- Atomic number (Z)
- 105
- Symbol
- Db
- Atomic mass
- 268 g/mol
- Category
- Transition metal
- Group
- 5
- Period
- 7
- Electron configuration
- [Rn] 5f¹⁴ 6d³ 7s²
- Electronegativity (Pauling)
- —
- Atomic radius
- —
- First ionization energy
- 665 kJ/mol
- Melting point
- —
- Boiling point
- —
- Density
- 29.3 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1967