Isotopes of nickel

Naturally occurring nickel (₂₈Ni) consists of five stable isotopes; Ni, Ni, Ni, Ni and Ni; Ni is the most abundant at over 68%. 26 radioisotopes have been characterized; the most stable are Ni with a half-life of 81,000 years, Ni with a half-life of 101 years, and Ni at 6.075 days. All the other radioactive isotopes have half-lives of less than 60 hours and most of these have half-lives of less than 30 seconds. This element also has 11 known meta states.