Periodic Table

Nihonium

Unknown

Quick Facts about Nihonium

Cn
  • solid- state of matter at room temperature
  • Radioactive- no stable isotopes exist
Fl

Nihonium (Nh) is element 113 on the periodic table. Atomic mass of Nh: 286.0000 u. Nh is in period 7, group 13. Melting point of Nh: 700.00 K.Density of Nh: 16.00 g/cm³.

Why Nihonium Matters

Nihonium in everyday life and industry

In Your Home

  • No commercial applications
  • Research element only
  • First element discovered in Asia
  • Extremely short half-life

In Your Body

✗ Not essential

No biological role. Too unstable for study. Only a few atoms ever made.

Safety: Nihonium is radioactive

Discovery of Nihonium

Discovered by RIKEN in Japan, 2015

Name origin: Named after the country of Japan.

History & Events

2004
Named after Nihon, Japan in Japanese
2004
First element discovered in Japan (RIKEN, 2004)
2004
First element discovered in Asia to be named by Asian scientists
2016
Named in 2016

About Nihonium

Named after Japan (Nihon); first element discovered in Asia.

Atomic Properties of Nh

Atomic Number of Nh
113
Atomic Mass of Nh
286.0000 u
Electron Configuration
[Rn] 5f14 6d10 7s2 7p1
Electronegativity
Block
p-block
Group
13
Period
7

Physical Properties of Nh

Phase (STP)
solid
Melting Point of Nh
700.00 K
Boiling Point of Nh
1400.00 K
Density of Nh
16.0000 g/cm3

Atomic Radii

Covalent
136 pm

Common Misconceptions

Wrong:Nihonium was named after a scientist.
Correct:'Nihon' is the Japanese word for Japan—the element honors the entire country.
Wrong:RIKEN is a small specialized lab.
Correct:RIKEN is Japan's largest comprehensive research institution, comparable to national labs in other countries.
Wrong:The seventh period was completed long ago.
Correct:Nihonium (along with Fl, Mc, Lv, Ts, Og) completed the seventh period in 2016—a major milestone.

Isotopes of Nihonium

Nihonium has 0 naturally occurring isotopes, plus 2 notable radioactive isotopes.

IsotopeAtomic Mass (u)AbundanceHalf-LifeDecay Mode
284113Nh (Nh-284)Nihonium-284 isotope0%0.48 sα
286113Nh (Nh-286)Nihonium-286 isotope0%20 sα

Data source: NIH PubChem (aggregated from IUPAC, NIST)

Sources

Made by bombardng bismuth-209 with zinc-70.

Geochemistry

Goldschmidt
synthetic

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