Chemistry help?
1.Thinking about the uses of radioactive isotopes,which statement is true?
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- D.Radiactive isotopes used in the medical diagnosis have long lives and are quickly absorbed by the body
- B.Radiation may be detected because it ionizes the atoms it affects
- A.The iodine isotope, I-27,is used to diagnose thyroid disorders
- A.) There is no isotope I-27. I-131 is used to treat some cancers of the thyroid, and I-123 is often used in nuclear imaging of the Thyroid.
B.) This depends on the type of radation.
C.) This is the true statement: irradation is used to sterilize food, specifically killing bacteria.
D.) This statement is half-true - the isotopes are quickly absorbed by the body, but they are used because they have *short* half-lives, otherwise they'd continue to be radioactive in the body.
- C.It's clearly understood that irridiation food kills bacteria and contaminates the food