A patient is administered 25 mg of iodine-131. How much of this isotope will remain in the body after 40 days if the half-life of iodine-131 is 8 days? (10
POINTS) *

Iodine-131 (131I, I-131) is an important radioisotope of iodine discovered by Glenn Seaborg ... Likewise, most studies of very-high-dose 131I for treatment of Graves' disease ... Iodine-131 can be "seen" by nuclear medicine imaging techniques (i.e., ... Radioactive tracer isotopes are injected with hydraulic fracturing fluid

Explanation:

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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