Unknown
Nihonium
The first element discovered in Japan, fleeting and synthetic.
Atomic #113Mass[286]Blockp-blockPeriod7Group13
Nh113 · [286]
3D Atom Explorer
Inside the Nihonium atom
Switch between Bohr and Quantum Cloud modes to compare a simple teaching model with a more realistic probability-based view, and follow the guided tour to explore the Nihonium atom step by step.
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Electron configuration
[Rn] 5f14 6d10 7s2 7p1
A neutral Nihonium atom has 113 electrons (equal to its proton count). Choosing a different isotope above changes only the neutron count.
Shell distribution
Shell 12 e⁻Shell 28 e⁻Shell 318 e⁻Shell 432 e⁻Shell 532 e⁻Shell 618 e⁻Shell 73 e⁻
Electrons fill inner shells before outer ones; the outermost (valence) shell drives the element's chemistry.
Properties
Physical & atomic properties
- State (room temp)
- Unknown
- Melting point
- —
- Boiling point
- —
- Density
- —
- Electronegativity
- —
- Atomic radius
- —
- 1st ionization energy
- —
- Category
- Unknown
History
Discovery & naming
- Discovered
- 2004
- Discovered by
- RIKEN team, Japan
- Origin of name
- 'Nihon', a Japanese name for Japan.
Notable uses
Scientific research only.
Cosmic origin
Where Nihonium comes from
Human synthesis
Synthetic, and the first element discovered in Japan.
Simplified origin map — many elements form through more than one astrophysical pathway.
Summary
- Atomic number
- 113
- Atomic mass
- [286]
- Category
- Unknown
- Group · Period
- 13 · 7
- Block
- p-block
- Shells
- 2 · 8 · 18 · 32 · 32 · 18 · 3