Db
Transition metal
Dubnium
Z 105A 268mass 268
Atomic model
tap a particleEvery nucleon is drawn individually — 105 protons and 163 neutrons packed into the nucleus, with 105 electrons on shells outside.
105+1
Protons
Set the element — change this and it becomes a different atom.
1630
Neutrons
Change only these and you get a different isotope of the same element.
105−1
Electrons
Sit outside the nucleus and decide the chemistry, not the element.
Element data
- Nucleons
- 268 (105 p + 163 n)
- Electron shells
- 2 · 8 · 18 · 32 · 32 · 11 · 2
- Valence shell
- 2 electrons
- Atomic mass
- 268 u
Stability
Dubnium has no measured radioactive isotope in this lab — its nuclei are stable, so decay must be shown as an illustration.
Open the decay lab