105Db[268]
Dubnium
Transition metalsHard, shiny metals that conduct heat and electricity well and often form coloured compounds.
[Rn] 5f¹⁴ 6d³ 7s²
- Atomic number
- 105
- Atomic mass
- [268]
- Protons
- 105
- Neutrons
- 163
- Electrons
- 105
- Shells
- 2, 8, 18, 32, 32, 11, 2
- State at 25 °C
- Unknown
- Position
- Group 5, period 7
Proton (+)Neutron (0)Electron (−)
Discovered byTeams at Dubna and Berkeley, around 1968–1970Albert Ghiorso: 12 elements
Named after Dubna, the Russian town home to a major nuclear research institute.
Did you know?
- Its naming was argued over for decades.
- Only a handful of atoms have been studied.
Where it's found
- Made only in laboratories, a few atoms at a time
What it's used for
- Scientific research only
Try it
There's no safe home experiment for Dubnium. Explore it with the animated atom above instead.