Atomic number 105
Dubnium
Transition metal
No photo: here’s why
Dubnium is a synthetic element made only in vanishingly small, intensely radioactive amounts - its atoms decay so quickly that no piece big enough to see or photograph has ever existed.
Quick facts
- Atomic mass
- 268.00
- Group
- 5
- Period
- 7
- State (STP)
- unknown
- Electronegativity
- –
- Common ox. states
- +5
Properties
[Rn] 5f¹⁴ 6d³ 7s²
- Ionization energy
- –
- Electron affinity
- –
- Melting point
- –
- Boiling point
- –
How dangerous is it?
A synthetic element built one atom at a time by smashing nuclei together; the atoms vanish in seconds, so no real quantity has ever existed.
- RadioactiveImmediate
It is fiercely radioactive in principle, yet it decays before any meaningful amount can gather.
Examined only inside accelerator labs by remote instruments, never held or stored.
How it bonds· family overview
Dubnium (Db) is a synthetic super-heavy element produced one atom at a time. Its position predicts d-block transition-metal chemistry - multiple oxidation states, oxide and halide salts - but only a handful of atoms have ever existed, so the chemistry is largely inferred from group trends.
