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
Frequently asked questions
What is Dubnium?
Dubnium (Db) is a transition metal, element number 105 on the periodic table. Named after Dubna, Russia.
What is the atomic number and atomic mass of Dubnium?
Dubnium has atomic number 105 and an atomic mass of about 268 g/mol.
What is the electron configuration of Dubnium?
The electron configuration of Dubnium is [Rn] 5f¹⁴ 6d³ 7s².
Where is Dubnium on the periodic table?
Dubnium sits in group 5, period 7, and is classified as a transition metal.