Atomic Number:112Atomic Radius:empirical: 147 pm (predicted)[1][5]
Atomic Symbol:CnMelting Point:
Atomic Weight:285Boiling Point:357+112−108 K ​(84+112−108 °C, ​183+202
−194 °F)[3]
Electron Configuration:[Rn] 7s2 5f14 6d10 (predicted)[1]
Oxidation States:2, (1), 0 ​​(parenthesized oxidation states are predictions)[1][4][5]


On February 9, 1996, element 277Cn was created at the Gesellschaft fur Schwerionenforschung in Darmstadt, Germany by using the reaction 208Pb + 70Zn. Unlike element 110, Copernicium has properties more similar to radon than mercury, but due to its short half-life, it is difficult to study. As of 2011, Copernicum’s most stable isotope has an atomic weight of 285.