Metal radioactivesynthetic
Symbol: Cn
Atomic number: 112
Atomic mass: (277)
Group: Transition Metal
CAS-number: 54084-26-3

Physical data
Other info
Rg Roentgenium To Periodic Table UnuntriumUut
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Physical data

Electronic data

Shells: 2, 8, 18, 32, 32, 18, 2
Orbitals: [Rn] 5f14 6d10 7s2
Electronegativity: --, --
1. Ionization potential: -- eV
2. Ionization potential: -- eV
3. Ionization potential: -- eV
Oxidation states: 4, 2, 0
Electrical conductivity: --

Thermal data

Melting point: -- °C
Boiling point: -- °C
Specific heat: -- J/gK
Heat of fusion: -- kJ/mol
Heat of vaporization: -- kJ/mol
Thermal conductivity: -- W/cmK

Steric data

Atomic radius: -- Å
Ionic radius: -- Å
Covalent radius: -- Å
Atomic volume: -- cm³/mol
Density (293 K): -- g/cm³
Crystal structure: --


No data

Other info

Name origin:Named after Nicolaus Copernicus. Originally called Ununbium, the IUPAC temporary systematic name.
Description:Synthetic radioactive metal.
Discovered by:S. Hofmann, V. Ninov, F. P. Hessberger, P. Armbruster, H. Folger, G. Münzenberg, and others
Year:9. Feb 1996
Place:Gesellschaft für Schwerionenforschung (GSI) in Darmstadt, Germany.
Sources:Produced by firing accelerated zinc-70 nuclei at lead-208 nuclei in a heavy ion accelerator.
Use(s):It has no significant commercial applications.