Use the fact that there are 3.13x107 s/year. (a) The half-life of the radioactive nucleus 22688Ra is 1.58x103 years. What is the decay constant (in s-1) of 22688Ra? (b) If a sample of 22688Ra nuclei has a decay rate of 3.9x105 decays /s at t = 0, then what is the decay rate after the sample is 4740 years old?

Use the fact that there are 3.13x107 s/year. (a) The half-life of the radioactive nucleus 22688Ra is 1.58x103 years. What is the decay constant (in s-1) of 22688Ra? (b) If a sample of 22688Ra nuclei has a decay rate of 3.9x105 decays /s at t = 0, then what is the decay rate after the sample is 4740 years old?

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Question

Use the fact that there are 3.13x10⁷ s/year.

(a) The half-life of the radioactive nucleus ²²⁶₈₈Ra is 1.58x10³ years. What is the decay constant (in s^-1) of ²²⁶₈₈Ra? (b) If a sample of ²²⁶₈₈Ra nuclei has a decay rate of 3.9x10⁵ decays /s at t = 0, then what is the decay rate after the sample is 4740 years old?

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