Co decays with a half-life of 5.27 years to produce 8 Ni. 60 (a) What is the decay constant for the radioactive disintegration of cobalt-60? (b) Calculate the fraction of a sample of the Co isotope that will remain after 15 years. (c) How long does it take for a sample of 29 Co to disintegrate to the extent that only 2.0% of the original amount remains?

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H.W 1
Co decays with a half-life of 5.27 years to produce Ni.
(a) What is the decay constant for the radioactive disintegration of cobalt-60?
(b) Calculate the fraction of a sample of the Co isotope that will remain after 15 years.
(c) How long does it take for a sample of 29 Co to disintegrate to the extent that only 2.0% of the original
amount remains?
Transcribed Image Text:H.W 1 Co decays with a half-life of 5.27 years to produce Ni. (a) What is the decay constant for the radioactive disintegration of cobalt-60? (b) Calculate the fraction of a sample of the Co isotope that will remain after 15 years. (c) How long does it take for a sample of 29 Co to disintegrate to the extent that only 2.0% of the original amount remains?
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