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112Cn285.000
Copernicium
Transition MetalCopernicium 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.
Phase: Gas
2, 8, 18, 32, 32, 18, 2
Physical Properties
Atomic Mass285 u
Density23.7 g/cm³
Boiling Point3570 K
Period7
PhaseGas
Chemical Properties
Electron Configuration1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d10
Semantic Config*[Rn] 5f14 6d10 7s2
Shells2, 8, 18, 32, 32, 18, 2
Discovery
Discovered byGesellschaft für Schwerionenforschung