A sample of radioisotope C has a specific activity of

PHYSICS · Subjective · A Level · Physics · Nuclear physics · Nuclear physics

Problem

A 5.0 g5.0\,\text{g} sample of radioisotope C has a specific activity of 0.75 mCi g−10.75\,\text{mCi\,g}^{-1}. The half-life of C is 10 d10\,\text{d}. (a) Convert the specific activity to Bq g−1\text{Bq\,g}^{-1}. (b) Calculate the decay constant λ\lambda of the isotope in d−1\text{d}^{-1}. (c) Determine the total number of undecayed nuclei present in the sample at the stated time. (d) Estimate the time required for the total activity of the sample to decrease to 1.0×107 Bq1.0\times10^{7}\,\text{Bq}.

Related theory

Browse the problem library