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How long does copernicium-285 last before radioactive decay?
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zinc group element
Modern version of the periodic table of the elements (printable).
The isotope copernicium-285 has a half-life of 34 seconds before it undergoes radioactive decay.1
It is important to note that while some isotopes of copernicium—such as the first produced isotope, copernicium-277—decay in less than a thousandth of a second, copernicium-285 is currently recognized as the longest-lasting isotope of the element.12