Atomic number 108
Hassium
Transition metal
No photo: here’s why
Hassium 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
- 269.00
- Group
- 8
- Period
- 7
- State (STP)
- unknown
- Electronegativity
- –
- Common ox. states
- +8
Properties
[Rn] 5f¹⁴ 6d⁶ 7s²
- Ionization energy
- –
- Electron affinity
- –
- Melting point
- –
- Boiling point
- –
How dangerous is it?
This element is built atom by atom in an accelerator and lasts only a few seconds, so it never exists in any amount a person could meet.
- RadioactiveImmediate
Each atom is strongly radioactive as it decays, but the supply is always just a few short-lived atoms.
Handled only by remote instruments in a small number of research labs.
How it bonds· family overview
Hassium (Hs) 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.
