Isotopes of copernicium
List of isotopes
Abbreviations: SF: Spontaneous fission Not directly synthesized, created as decay product of ²⁸⁵Fl Not directly synthesized, created as decay product of ²⁸⁸Fl Not directly synthesized, created as decay product of ²⁸⁹Fl Not directly synthesized, created as decay product of ²⁹⁴Lv This isotope is unconfirmed

Isotopes of copernicium

Section Title: List of isotopes
Table Section Text: Abbreviations: SF: Spontaneous fission Not directly synthesized, created as decay product of ²⁸⁵Fl Not directly synthesized, created as decay product of ²⁸⁸Fl Not directly synthesized, created as decay product of ²⁸⁹Fl Not directly synthesized, created as decay product of ²⁹⁴Lv This isotope is unconfirmed

nuclide symbol	Z(p)	N(n)	isotopic mass (u)	half-life	decay mode(s)	daughter isotope(s)	nuclear spin and parity

excitation energy

277Cn	112	165	277.16364(15)#	1.1(7) ms [0.69(+69−24) ms]	α	273Ds	3/2+#

281Cn	112	169	281.16975(42)#	180 ms	α	277Ds	3/2+#

282Cn	112	170	282.1705(7)#	0.8 ms	SF	(various)	0+

283Cn	112	171	283.17327(65)#	4 s	α (90%)	279Ds

SF (10%)	(various)

EC?	283Rg

284Cn	112	172	284.17416(91)#	97 ms	SF	(various)	0+

α	280Ds

285Cn	112	173	285.17712(60)#	29 s	α	281Ds	5/2+#

286Cn	112	174	8.45 s	SF	(various)	0+

Sentence(s)

The nuclide decayed copernicium-285, emitted an alpha particle.

final_sentence: The nuclide decayed copernicium-285, emitted an alpha particle.