Asmall amount of americium-241 is used in smoke detectors. a stream of radiation flows between two electrodes. if smoke interrupts the stream, the alarm goes off. what feature of the radioisotope americium-241 would be most for the smoke detector to work?

You exhale co2 which is produced during cellular respiration.  co2 combines with the water in your blood's plasma to make up one half of the body's most important buffer pair, carbonic acid.  the more physical activity you engage in, the more co2 your body is producing.  you can see this by putting some of the cabbage indicator in a glass and then blowing bubbles into it through a straw.  can you see a change in the color of the indicator?