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Cobalt-60

Isotope
Cobalt-60 is a synthetic radioactive isotope of cobalt with a half-life of 5.2714 years. It is produced artificially in nuclear reactors. Wikipedia
Protons: 27
Neutrons: 33
Half-life (t1/2): 5.27 years
Natural abundance: trace
Spin: 5+
Symbol: 60Co
β (beta decay): 0.317