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

Data-based representation, not a photograph

113NhNihonium

A locally stored, license-verified sample photograph has not been curated yet.

Data visualization for Nihonium — not a photograph of an element sample.

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

Shell occupancy is derived from the versioned PubChem electron configuration. Dot angles are schematic and do not represent orbitals. The underlying electron configuration is marked as predicted in the source dataset.

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

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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.