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Radioactive Decay

Q. Iodine-131 is one of the most important isotopes used in the diagnosis of thyroid cancer. One atom has a mass of 130.906114 amu. (a) Calculate the binding energy per nucleoli in MeV: __ MeV/nucleon (b) Per atom in MeV: __ MeV/atom (c) Per mole in kJ: __ x 10 __ kJ/mol

Solved • Aug 5, 2019

Radioactive Decay

Q. Be sure to answer all parts. The carbon−14 decay rate of a sample obtained from a young tree is 0.254 disintegration per second per gram of the sample. Another wood sample prepared from an object recovered at an archaeological excavation gives a decay rate of 0.178 disintegration per second per gram of the sample. What is the age of the object? (The half-life of carbon−14 is 5715 years.)

Solved • Jul 13, 2019

Radioactive Decay

Q. At 8:00 a.m, a patient receives a 1.5-mg dose of I-131 to treat thyroid cancer. If the nuclide has a half-life of eight days, what mass of the nuclide remains in the patient at 5:00 pm the next day? (Assume no excretion of the nuclide from the body.)

Solved • Jun 17, 2019