Nh Nihonium
Element Information, Facts, Properties, Trends, Uses, Comparison with other elements

Nihonium is a chemical element with atomic number 113. It has a symbol Nh. It is a synthetic element (an element that can be created in a laboratory but is not found in nature) and is extremely radioactive; its most stable known isotope, nihonium-286, has a half-life of 20 seconds.
It belongs to group 13 of the periodic table having trivial name triels, icosagens. It got its trivial name from triels from Greek tri (three, III).
Nihonium Facts
Read key information and facts about element Nihonium
Name | Nihonium |
Atomic Number | 113 |
Atomic Symbol | Nh |
Atomic Weight | 284 |
Phase | Solid |
Color | - |
Appearance | - |
Classification | Post Transition Metal |
Group in Periodic Table | 13 |
Group Name | boron family |
Period in Periodic Table | period 7 |
Block in Periodic Table | p -block |
Electronic Configuration | [Rn] 5f14 6d10 7s2 7p1 |
Electronic Shell Structure (Electrons per shell) | 2, 8, 18, 32, 32, 18, 3 |
Melting Point | - |
Boiling Point | - |
CAS Number | CAS54084-70-7 |
How to Locate Nihonium on Periodic Table
Periodic table is arranged by atomic number, number of protons in the nucleus which is same as number of electrons. The atomic number increases from left to right. Periodic table starts at top left ( Atomic number 1) and ends at bottom right (atomic number 118). Therefore you can directly look for atomic number 113 to find Nihonium on periodic table.
Another way to read periodic table and locate an element is by using group number (column) and period number (row). To locate Nihonium on periodic table look for cross section of group 13 and period 7 in the modern periodic table.
Nihonium History
The element Nihonium was discovered by K. Morita et al.(RIKENin Wako, Japan) in year 2004 in Russia and United States. Nihonium was first isolated by in . Nihonium derived its name from the Japanese name for Japan, Nihon, where the element was first synthesized.
Prepared by bombardment of bismuth with zinc
Nihonium Presence: Abundance in Nature and Around Us
The table below shows the abundance of Nihonium in Universe, Sun, Meteorites, Earth's Crust, Oceans and Human Body.
ppb by weight (1ppb =10^-7 %) | ppb by atoms (1ppb =10^-7 %) | |
---|---|---|
Abundance in Universe | - | - |
Abundance in Sun | - | - |
Abundance in Meteorites | - | - |
Abundance in Earth's Crust | - | - |
Abundance in Oceans | - | - |
Abundance in Humans | - | - |
Crystal Structure of Nihonium
The solid state structure of Nihonium is .
The Crystal structure can be described in terms of its unit Cell. The unit Cells repeats itself in three dimensional space to form the structure.
Unit Cell Parameters
The unit cell is represented in terms of its lattice parameters, which are the lengths of the cell edges Lattice Constants (a, b and c)
a | b | c |
---|---|---|
and the angles between them Lattice Angles (alpha, beta and gamma).
alpha | beta | gamma |
---|---|---|
The positions of the atoms inside the unit cell are described by the set of atomic positions ( xi, yi, zi) measured from a reference lattice point.
The symmetry properties of the crystal are described by the concept of space groups. All possible symmetric arrangements of particles in three-dimensional space are described by the 230 space groups (219 distinct types, or 230 if chiral copies are considered distinct.
Space Group Name | - | ![]() |
Oxidation States | Space Group Number | - |
Crystal Structure | - |
Nihonium Atomic and Orbital Properties
Nihonium atoms have 113 electrons and the electronic shell structure is [2, 8, 18, 32, 32, 18, 3] with Atomic Term Symbol (Quantum Numbers) 2P1/2.
Atomic Number | 113 |
Number of Electrons (with no charge) | 113 |
Number of Protons | 113 |
Mass Number | 284 |
Number of Neutrons | 171 |
Shell structure (Electrons per energy level) | 2, 8, 18, 32, 32, 18, 3 |
Electron Configuration | [Rn] 5f14 6d10 7s2 7p1 |
Valence Electrons | 7s2 7p1 |
Valence (Valency) | - |
Main Oxidation States | - |
Oxidation States | |
Atomic Term Symbol (Quantum Numbers) | 2P1/2 |
Bohr Atomic Model of Nihonium - Electrons per energy level

n | s | p | d | f |
---|
Ground State Electronic Configuration of Nihonium - neutral Nihonium atom
Abbreviated electronic configuration of Nihonium
The ground state abbreviated electronic configuration of Neutral Nihonium atom is [Rn] 5f14 6d10 7s2 7p1. The portion of Nihonium configuration that is equivalent to the noble gas of the preceding period, is abbreviated as [Rn]. For atoms with many electrons, this notation can become lengthy and so an abbreviated notation is used. This is important as it is the Valence electrons 7s2 7p1, electrons in the outermost shell that determine the chemical properties of the element.
Unabbreviated electronic configuration of neutral Nihonium
Complete ground state electronic configuration for the Nihonium atom, Unabbreviated electronic configuration
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f14 6d10 7s2 7p1
Electrons are filled in atomic orbitals as per the order determined by the Aufbau principle, Pauli Exclusion Principle and Hund’s Rule.

Atomic Structure of Nihonium
Nihonium atomic radius is - , while it's covalent radius is - .
Atomic Radius Calculated | - (0 Å) |
Atomic Radius Empirical | - (0 Å) |
Atomic Volume | - |
Covalent Radius | - |
Van der Waals Radius | - |
Neutron Cross Section | - |
Neutron Mass Absorption | - |
Atomic Spectrum of Nihonium
Nihonium Chemical Properties: Nihonium Ionization Energies and electron affinity
The electron affinity of Nihonium is - .
Valence | - |
Electronegativity | - |
ElectronAffinity | - |
Ionization Energy of Nihonium
Refer to table below for Ionization energies of Nihonium
Ionization energy number | Enthalpy - kJ/mol |
---|
Nihonium Physical Properties
Refer to below table for Nihonium Physical Properties
Density | - |
Molar Volume | - |
Elastic Properties
Young Modulus | - |
Shear Modulus | - |
Bulk Modulus | - |
Poisson Ratio | - |
Hardness of Nihonium - Tests to Measure of Hardness of Element
Mohs Hardness | - |
Vickers Hardness | - |
Brinell Hardness | - |
Nihonium Electrical Properties
Nihonium is Conductor of electricity. Refer to table below for the Electrical properties ofNihonium
Electrical Conductivity | - |
Resistivity | - |
Superconducting Point | - |
Nihonium Heat and Conduction Properties
Thermal Conductivity | - |
Thermal Expansion | - |
Nihonium Magnetic Properties
Magnetic Type | - |
Curie Point | - |
Mass Magnetic Susceptibility | - |
Molar Magnetic Susceptibility | - |
Volume Magnetic Susceptibility | - |
Optical Properties of Nihonium
Refractive Index | - |
Acoustic Properties of Nihonium
Speed of Sound | - |
Nihonium Thermal Properties - Enthalpies and thermodynamics
Refer to table below for Thermal properties of Nihonium
Melting Point | - (-273.15°C, -459.66999999999996 °F) |
Boiling Point | - (-273.15°C, -459.66999999999996 °F) |
Critical Temperature | - |
Superconducting Point | - |
Enthalpies of Nihonium
Heat of Fusion | - |
Heat of Vaporization | - |
Heat of Combustion | - |
Nihonium Isotopes - Nuclear Properties of Nihonium
Nihonium has 5 isotopes, with between 283 and 287 nucleons. Nihonium has 0 stable naturally occuring isotopes.
Isotopes of Nihonium - Naturally occurring stable Isotopes: -.
Isotope | Z | N | Isotope Mass | % Abundance | T half | Decay Mode |
---|---|---|---|---|---|---|
283Nh | 113 | 170 | 283 | Synthetic | ||
284Nh | 113 | 171 | 284 | Synthetic | 20 m | AlphaEmission |
285Nh | 113 | 172 | 285 | Synthetic | ||
286Nh | 113 | 173 | 286 | Synthetic | ||
287Nh | 113 | 174 | 287 | Synthetic |
Regulatory and Health - Health and Safety Parameters and Guidelines
Database Search
List of unique identifiers to search the element in various chemical registry databases
Database | Identifier number |
---|---|
CAS Number - Chemical Abstracts Service (CAS) | CAS54084-70-7 |
RTECS Number | - |
CID Number | - |
Gmelin Number | - |
NSC Number | - |