Atomic number 113
Nihonium
Post-transition metal
No photo: here’s why
Nihonium 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
- 286.00
- Group
- 13
- Period
- 7
- State (STP)
- unknown
- Electronegativity
- –
- Common ox. states
- +1, +3, +5
Properties
[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p¹
- Ionization energy
- –
- Electron affinity
- –
- Melting point
- –
- Boiling point
- –
How dangerous is it?
The first element discovered in Japan, made atom by atom in an accelerator; each atom decays almost at once, so none of it exists in the wider world.
- RadioactiveImmediate
It is intensely radioactive as it falls apart, but the atoms are far too short-lived to collect.
Created and watched only by remote equipment inside specialized research labs.
How it bonds· family overview
Nihonium (Nh) is a synthetic super-heavy p-block element. Group trends predict post-transition-metal behavior (a small set of low oxidation states, soft metallic character), but only a handful of atoms have ever existed.
