Gold-198 is used to treat liver cancer. Its half-life is 2.7 days. If you ingest 3.75 mg of Au-198, how long would you have to wait for the amount of Au-198 to fall to 0.75 mg?

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.