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.
112
Atomic Number
285 u
Atomic Mass
null K
Melting Point
null K
Boiling Point
23.7 g/liter
Density
null Å
Atomic Radius
null Å
Covalent Radius
null eV
First Ionization Energy
7
Number of Shells
2, 8, 18, 32, 32, 18, 2
Electron Shell Occupations