Which of the following is not a use for radioactive isotopes?
a.as tracers for diagnosing a disease
b.as an additive to paints to increase durability
c.as a way to treat forms of cancer
d.as a way to study biochemical processes in plants
To determine which of the options is not a use for radioactive isotopes, we need to go through each choice individually and identify if it involves the use of radioactive isotopes.
a. Using radioactive isotopes as tracers for diagnosing a disease is a genuine application of radioactive isotopes. Certain isotopes can be introduced into the body and tracked to evaluate the function of organs or detect any abnormalities.
b. Adding radioactive isotopes to paints to enhance their durability is not a known use for radioactive isotopes. This application is incorrect as it does not align with any established use of radioactive isotopes.
c. Utilizing radioactive isotopes to treat certain forms of cancer is a legitimate use. Some isotopes emit radiation that can selectively target and destroy cancer cells.
d. Studying biochemical processes in plants using radioactive isotopes is another valid use. By introducing isotopes into plant systems, scientists can track how certain elements are absorbed, transported, and utilized by plants.
Therefore, the correct answer is b. As an additive to paints to increase durability, which is not a known use for radioactive isotopes.