Phosphorus-32 is a radioactive isotope with a half-life of 14.3d(d= days). A biochemist has a vial containing a compound of phosphorus-32. If the compound is used in an experiment 5.60d after the compound was prepared, what fraction of the radioactive isotope originally present remains? Suppose the sample in the vial originally contained 0.310g of phosphorus-32. How many grams remain after 5.60 d? Fraction P-32 nuclei remaining = g P-32 remaining 10 item attempts remaining