A radioactive isotope decays by ß- emission.a) iii.What is radioactive decay, and how is it related to the stability ofatomic nuclei?Describe the effect of ßDescribe the effect of ßemission on the proton number.emission on the nucleon number.iii.b) A radioactive isotope has a half-life of 130 s. A sample of the isotopehas an initial activity of 500 kBq.i. Determine the time taken for the activity to reduce to 125 kBq.ii. Determine the initial number of atoms of the isotope in the sample.iii. Determine the time taken for the activity of the sample to reduce to50 kBq.

Atoms consist of a nucleus composed of protons and neutrons, surrounded by electrons. The stability…

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