Potassium and calcium fluoride are both metals
People who work with radioactive materials often wear a film badge to reveal how much radiation they have been exposed to. The film badge dosimeter or the film badge is a dosimeter worn by these people working with materials that are radioactive for the purpose of monitoring cumulative radiation dose due to ionizing radiation. The badge has two parts; the photographic film, and a holder.
Answer:
C
Explanation:
Neon is a noble gas, which is monoatomic.
Answer:
chemical, is the answer your looking for
Chemical change because it cannot be reversed