Given the mass of a radioactive material, phosphorus 32P is 0.60 g and its half-life, T1/2 is 14.3 days. i) What is the initial number of nuclei of 32P? ii) Determine the number of remaining nuclei of ³2P after 20 days iii) What is its activity after 20 days? iv) Calculate the time taken for its activity to reduce to one decay per second.

Given the mass of a radioactive material, phosphorus 32P is 0.60 g and its half-life, T1/2 is 14.3 days. i) What is the initial number of nuclei of 32P? ii) Determine the number of remaining nuclei of ³2P after 20 days iii) What is its activity after 20 days? iv) Calculate the time taken for its activity to reduce to one decay per second.