If the half-life of iodine-131 is 8 days, how old is a sample if only ¼ of the original amount remains? Write 2 – 3 sentences explaining your reasoning.

Question : Nuclear Changes

a. Write the symbol for the nucleus that completes the following nuclear equation:

b. Write the symbol for the nucleus that completes the following nuclear equation:

c. If the half-life of iodine-131 is 8 days, how old is a sample if only ¼ of the original amount remains? Write 2 – 3 sentences explaining your reasoning.

d. What type of nuclear reaction is shown in the diagram below? Write 2 – 3 sentences describing what happens in this reaction, where it happens, and how the energy released can be harnessed for use in homes.