QUESTION 15 152 Eu is a radioisotope with a half-life of approximately 14 years. A student works with a sealed source of 152 Eu with
QUESTION 15 152 Eu is a radioisotope with a half-life of approximately 14 years. A student works with a sealed source of 152 Eu with a current activity of 1 μCi. Complete the following table. Atomic Number Mass Number Number of Neutrons Half-Life 14 years Current Activity 1.0 μCi Number of Half-Lives between now and 70 years from now Remaining activity 70 years from now (as a percentage) % Report to 2 significant figures Remaining activity 70 years from now (in μCi) μCi Report to 2 significant figures
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