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Copernicium (Cn)
Atomic number: 112 · Category: transition metal · Group 12 · Period 7 · Phase: Liquid
Copernicium 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.
Block: d
Electronic structure
Electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d10
Configuration (semantic): *[Rn] 5f14 6d10 7s2
Shells: 2, 8, 18, 32, 32, 18, 2
Periodic position
Group: 12
Period: 7
xpos: 12
ypos: 7
Spectral/Bohr images
Image
3D Model