Nihonium
Nihonium (鉨, symbol Nh) is chemical element number 113, an Unknown in period 7, group 13 of the periodic table, with a standard atomic weight of about 286. First element discovered in Asia. Named after Japan (Nihon).
Properties
| Atomic number | 113 |
|---|---|
| Symbol | Nh |
| Atomic mass | 286 u |
| Category | Unknown |
| Period | 7 |
| Group | 13 |
| Electron configuration | [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p¹ |
| Electronegativity | — |
| Covalent radius | — |
| Density | 16 g/cm³ |
| Melting point | 700 K |
| Boiling point | 1430 K |
| Discovery | RIKEN, 2004 |
Overview
First element discovered in Asia. Named after Japan (Nihon). Element 113, Nihonium (Nh), is an Unknown found in period 7, group 13. Most of its properties still await further experimental confirmation.
Its electron configuration is [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p¹, with 3 electrons in the outer shell. Around 25 °C it is usually a solid; it melts near 700 K (426.9 °C), boils near 1430 K (1156.9 °C), has a density around 16 g/cm³.
In industry and daily life it turns up in Research. On the safety side, it carries a high hazard rating. It was first described by RIKEN in 2004. Use the comparison tool to line it up against other elements.
Electron shells
Electrons per shell: 2 · 8 · 18 · 32 · 32 · 18 · 3
Main uses
- Research
Hazard
Compounds containing Nihonium
No compounds in this knowledge base contain Nihonium yet.
Data sources
Atomic mass uses IUPAC (CIAAW) standard atomic weights; the covalent radius is from Cordero et al. (2008). Verify on the RSC Periodic Table, PubChem and Wikipedia. Educational reference only.