112
Cn
285
Copernicium
Transition Metal
Group 12
Period 7
Block d
Gas
Copernicium is a chemical element of the periodic table with chemical symbol Cn and atomic number 112 with an atomic weight of 285 u and is classed as transition metal and is part of group 12 (zinc group). Copernicium is gas at room temperature.
Copernicium in the periodic table
| Symbol | Cn |
| Atomic number | 112 |
| Group | 12 (Zinc group) |
| Period | 7 |
| Block | d |
| Classification | Transition Metal |
| Appearance | - |
| Color | - |
| Number of protons | 112 p+ |
| Number of neutrons | 173 n0 |
| Number of electrons | 112 e- |
From Wikipedia, the free encyclopediaCopernicium is a chemical element with symbol Cn and atomic number 112. It is an extremely radioactive synthetic element that can only be created in a laboratory. The most stable known isotope, copernicium-285, has a half-life of approximately 29 seconds, but it is possible that this copernicium isotope may have a nuclear isomer with a longer half-life, 8.9 min.
Physical properties
| Phase at STP | Gas |
| Density | 23.7 g/cm3 |
| Atomic weight | 285 u |
Thermal properties
| Melting point | - |
| Boiling point | 3570 K 3296.85 °C 5966.33 °F |
| Heat of vaporization | - |
Atomic properties
| Electronegativity (Pauling Scale) | - |
| Electron affinity | - |
| Oxidation states | 0, (+1), +2, (+4) (parenthesized: prediction) |
| Ionization energies |
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Electron configuration for copernicium
Electron configuration Shorthand configuration | [Rn] 5f14 6d10 7s2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Full configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d10 7s2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Electron configuration chart |
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| Electrons per shell | 2, 8, 18, 32, 32, 18, 2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Outer shell electrons | 2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Valence electrons (incl. d) | 2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Valency electrons | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Bohr model | Figure: Shell diagram of Copernicium (Cn) atom. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Orbital Diagram
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The history of Copernicium
| Discovery | Gesellschaft für Schwerionenforschung (1996) |
| Named by | GSI |
Discovery of copernicium Copernicium was first synthesized in February 1996 at GSI in Darmstadt by Sigurd Hofmann and colleagues, who fused zinc-70 ions with a lead-208 target to produce a single atom. IUPAC formally adopted the name in 2010, honouring Nicolaus Copernicus, the Renaissance astronomer who placed the sun at the centre of the solar system. | |
| Original word | Copernicus |
| Language of origin | English |
| Name source | Person |
| Meaning | “Nicolaus Copernicus” |
Naming The element is named in honour of Nicolaus Copernicus, the Renaissance astronomer who placed the Sun at the centre of the solar system. | |
Identifiers
List of unique identifiers for Copernicium in various chemical registry databases| CAS Number | 54084-26-3 |
| ChemSpider ID | - |
| EC number | - |
| PubChem CID Number | 135476785 |