Isotopes of copernicium

Isotopes of copernicium (₁₁₂Cn)
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Copernicium (₁₁₂Cn) is a synthetic element, and thus a standard atomic weight cannot be given. Like all synthetic elements, it has no stable isotopes. The first isotope to be synthesized was ²⁷⁷Cn in 1996. There are seven known radioisotopes (with one more unconfirmed); the longest-lived isotope is ²⁸⁵Cn with a half-life of 30 seconds.

^ Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.
^ Oganessian, Yu. Ts.; Utyonkov, V. K.; Ibadullayev, D.; et al. (2022). "Investigation of ⁴⁸Ca-induced reactions with ²⁴²Pu and ²³⁸U targets at the JINR Superheavy Element Factory". Physical Review C. 106 (24612). Bibcode:2022PhRvC.106b4612O. doi:10.1103/PhysRevC.106.024612. S2CID 251759318.