Cobalt- Thorium-G?

Half Life?

Answer:
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Cobalt-60 (60Co) is a radioactive isotope of cobalt, with a half life of 5.27 years.

Thorium-232 is the primary abundant nuclide of thorium. It is a slightly unstable radionuclide that is found in the earth's crust. It is a fertile material able to absorb a neutron and undergo transmutation into a nuclide that is able to support fission (uranium-233). The half-life of thorium-232 is 1.405×1010 years.

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