Question

A radioactive sample contains 1.55g of an isotope with a half-life of 3.7 days.

Part A:

What mass of the isotope will remain after 5.8 days? (Assume no excretion of the nuclide from the body.)

Express your answer using two significant figures.

Answer 1

a). 0.52293 grams will remain after 5.5 days

P(t) = P_o * (a)^(t/3.7)

P(t) = 1.55*(1/2)^(t/3.7)

P(t) = 1.55*(1/2)^(5.8/3.7)

P(t)= 0.52293 grams