Copernicium
Copernicium (鎶, symbol Cn) is chemical element number 112, an Unknown in period 7, group 12 of the periodic table, with a standard atomic weight of about 285. Named after Nicolaus Copernicus. Predicted to behave like a noble gas at room temperature.
Properties
| Atomic number | 112 |
|---|---|
| Symbol | Cn |
| Atomic mass | 285 u |
| Category | Unknown |
| Period | 7 |
| Group | 12 |
| Electron configuration | [Rn] 5f¹⁴ 6d¹⁰ 7s² |
| Electronegativity | — |
| Covalent radius | — |
| Density | 14 g/cm³ |
| Melting point | 283 K |
| Boiling point | 340 K |
| Discovery | GSI, 1996 |
Overview
Named after Nicolaus Copernicus. Predicted to behave like a noble gas at room temperature. Copernicium (symbol Cn) is chemical element number 112, sitting in period 7, group 12 of the periodic table and classed as an Unknown. Most of its properties still await further experimental confirmation.
With 2 electrons in its outermost shell, Copernicium bonds accordingly; full configuration [Rn] 5f¹⁴ 6d¹⁰ 7s². At room temperature it is normally a liquid (a very low melting point); it melts near 283 K (9.9 °C), boils near 340 K (66.9 °C), has a density around 14 g/cm³.
Common applications range across Research. It is regarded as a high-hazard element, so handle it with appropriate care. It was first described by GSI in 1996. See more trends in the visualization center.
Electron shells
Electrons per shell: 2 · 8 · 18 · 32 · 32 · 18 · 2
Main uses
- Research
Hazard
Compounds containing Copernicium
No compounds in this knowledge base contain Copernicium 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.