Copernicium (Cn), element 112 – Learn Acer periodic table

Transition metal, atomic number 112.

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.

Symbol Cn. Atomic mass 285.0 u. Group 12, period 7. Electron configuration [Rn] 5f14 6d10 7s2. Electrons per shell 2, 8, 18, 32, 32, 18, 2. State at room temperature: Liquid. Melting point 9.9 °C, boiling point 66.9 °C. Discovered by Gesellschaft für Schwerionenforschung.

Element data from Wikipedia, CC BY-SA 3.0.

Copernicium (Cn), element 112 – Learn Acer periodic table

Copernicium

Facts