Nh
Nihonium
Element 113 · Post-transition metal
Nihonium (Nh)
Nihonium is a synthetic element and the first discovered in an Asian country.
- Post-transition metal
- Period 7
- Group 13
- p-block
- solid at room temperature
- ☢ Radioactive
Key properties
- Atomic mass
- [286]
- u
- Electron configuration
- [Rn] 5f14 6d10 7s2 7p1
- Melting point
- 426.9 °C
- 700 K
- Boiling point
- 1,156.9 °C
- 1,430 K
- Density
- 16 g/cm³
- Electronegativity
- —
- Atomic radius
- —
- 1st ionisation energy
- —
Superheavy elements have only been made a few atoms at a time. Most properties shown are theoretical predictions.
Compare with every element:Electronegativity chartAtomic radius chartIonisation energy chartDensity chart of the elementsMelting point chartElectron configuration chart
Did you know?
Notable facts about nihonium
- 01
The RIKEN team ran its experiment for nine years and saw just three atoms.
- 02
It was made by fusing zinc-70 with bismuth-209.
- 03
A Russian–American team also reported it in 2004, but RIKEN received credit.
Applications
What is nihonium used for?
- Research
History
Discovery & name origin
Atomic structure
Atomic properties
Atomic structure
Atomic properties
- Atomic number
- 113
- Atomic mass
- [286] u
- Group
- 13
- Period
- 7
- Block
- p-block
- Electron configuration
- [Rn] 5f14 6d10 7s2 7p1
- Full configuration
- 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d10 7p1
- Electrons per shell
- 2, 8, 18, 32, 32, 18, 3
- Electronegativity (Pauling)
- —
- Electron affinity
- —
- Atomic radius (van der Waals)
- —
- Stable isotopes
- None — all isotopes are radioactive
Oxidation states
Highlighted: common oxidation states — none known.
Physical
Physical properties & colour
Physical
Physical properties & colour
- State at 20 °C
- Solid (predicted)
- Melting point
- 700 K · 426.9 °C · 800.3 °F
- Boiling point
- 1,430 K · 1,156.9 °C · 2,114.3 °F
- Density
- 16 g/cm³
- Molar heat capacity
- —
- Appearance
- —
- CPK model colour
- —
The CPK colour is the convention used for this element’s atoms in molecular models.
FAQ
Nihonium questions
What is Nh on the periodic table?
Nh is the symbol for nihonium, element 113 on the periodic table. It sits in group 13, period 7, in the post-transition metal category, and has an atomic mass of [286].
What is the atomic number of nihonium?
Nihonium has atomic number 113, so every nihonium atom has 113 protons in its nucleus. Its symbol is Nh and its atomic mass is [286].
Who discovered nihonium?
Nihonium was discovered by Kōsuke Morita in 2004 (Japan). The name comes from from Nihon, a Japanese name for Japan.
What is nihonium used for?
Nihonium is used for: research.
Is nihonium a metal?
Yes. Nihonium is a post-transition metal, one of the metallic elements.
What is the electron configuration of nihonium?
The electron configuration of nihonium is [Rn] 5f14 6d10 7s2 7p1 (predicted). Its 113 electrons are arranged in shells as 2, 8, 18, 32, 32, 18, 3.