Iodine-131 has a half life of 8 days. This means that after 8 days, half of the original mass of the isotope will have decayed. Suppose a sample of iodine-131 has a mass of 250. M models the amount of iodine-131 remaining after d days. a) Graph the exponential function. Explain how you came up with the graph. State the domain, range, equation for horizontal asymptote and M-intercept. b) What mass of iodine-131 remains after 3 days? Explain how you arrived at your answer.

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Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.