Chemical element · Atomic number 113
Nihonium
Nihonium in the periodic table: atomic number 113, electron configuration, atomic mass, physical data, oxidation states, media credit and visible sources.
Post-transition metal
expected to be solid
[286.182] u
Generated illustrationGenerated illustration, Quanta Study. Not a photograph of a sample.
Generated illustration of Nihonium; the image does not show a sample of the element.
Synthetic element produced a few atoms at a time; there is no visible sample.
Code-native illustration with the Quanta Study mark inside the image; not a photograph, no AI model involved.
Atomic classification
Shell occupancy
Nihonium in the Bohr shell model
This shows the electron distribution of the neutral atom in a simplified shell model.
- K · n=1
- 2 electrons
- L · n=2
- 8 electrons
- M · n=3
- 18 electrons
- N · n=4
- 32 electrons
- O · n=5
- 32 electrons
- P · n=6
- 18 electrons
- Q · n=7
- 3 electrons
- Electron configuration
- [Rn]5f14 6d10 7s2 7p1 (predicted)
- Electrons per shell
- 2 · 8 · 18 · 32 · 32 · 18 · 3
- Group
- 13
- Period
- 7
- Block
- P
- Element category
- Post-transition metal
Physical and chemical properties
- Atomic mass
- [286.182] u
- Standard state
- expected to be solid
- Density
- not reported
- Melting point
- not reported
- Boiling point
- not reported
- Electronegativity
- not reported
- First ionisation energy
- not reported
- Oxidation states
- not reported
- Discovery
- 2004
Safety and periodic classification
Safety
Safe handling cannot be inferred from Nihonium's position in the periodic table alone. Laboratory, classroom and disposal decisions must follow the documentation for the exact material and its safety data sheet.
Position and comparison
Nihonium is in period 7, group 13 and the P block. Its direct neighbours by atomic number are Copernicium and Flerovium. The snapshot does not report a Pauling electronegativity. Periodic trends are compared only through the separately sourced neighbouring values.
Sources and scope
PubChem attributes element data to sources including IUPAC, NIST and IAEA. Quanta stores the referenced snapshot locally and leaves unknown values unavailable.
Where Nihonium sits among the 118 elements
The table compares the reported values for Nihonium with every other element that carries the same value in the snapshot. A rank is not a judgement, it is orientation: it says how unusual this value is across the periodic table.
The snapshot reports no measured material data for Nihonium. That is normal for the heaviest elements, which exist only in minute quantities, and it is stated here instead of showing estimates.
All values and ranks come from the PubChem Periodic Table snapshot, retrieved on 2026-07-15. Elements without a reported value are excluded, so the population differs per row.
The neighbours of Nihonium in the periodic table
- Place in the table
- Group 13, period 7, P block. Classified as post-transition metal, expected to be solid at standard conditions.
- Direct neighbours
- Atomic number 113. Preceded by Copernicium, followed by Flerovium.
- Same group
- Same number of outer electrons, and therefore similar reactivity to Boron, Aluminum, Gallium, Indium, Thallium.
- Discovery
- Recorded in the snapshot as: 2004. Who, where and under what circumstances is not part of that record, so this page carries the sourced year and no discovery narrative.
- Oxidation states
- The snapshot lists no oxidation states.
Go from looking up chemistry to remembering it.
Turn your notes into source-backed study cards and review them at the right time.
Starter stays free · no payment details