The table below shows the half-lives of two of the radioactive isotopes that contaminated the environment. Isotope Half-life Caesium-137 30 years lodine-131 8 days (d) A soil sample was taken from the area around Chernobyl in 1986 The soil sample was contaminated with equal amounts of caesium-137 and iodine-131 Determine the year when the activity of the caesium-137 in the soil sample will be 1/32 of its original value.
