In physical science lab, ben and jerry added small prices of magnesium to hydrochloride acid. Do you notice that bubbles formed, the test you've got hot, and magnesium disappeared. What is the sign of a chemical reaction has taken place in this experiment? A. Odor B. Gas is produced C. Magnesium disappeared D. Decrease in temperature

Which statements best describe medical uses for radioactive isotopes? check all that apply. radioactive isotopes are used to detect medical problems. high-energy gamma rays are injected into the body. radioactive isotopes are used to treat some diseases. radiation is used to kill cancer cells. radioactive isotopes are directed at tumors from outside the body.