Cn
Copernicium · element 112
Transition Metal · Liquid at room temperature
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.
Key facts
Atomic mass
285 u
how heavy one atom is
Phase (room temp.)
Liquid
Density
14.0 g/cm³
how tightly packed it is
Boiling point
3570 K (3297 °C)
when liquid turns to gas
Period
7
its row in the periodic table
Group
12
its column in the periodic table
Block
D-block
the neighbourhood it lives in
Electron configuration
*[Rn] 5f14 6d10 7s2
where its electrons live
Shells
2 · 8 · 18 · 32 · 32 · 18 · 2
electrons in each layer, inside to out
Discovered by
Gesellschaft für Schwerionenforschung
who found it
Source: Wikipedia