A mixture in which the suspended particles are too small to be seen with the naked eye is a

Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.

How is the atomic number of a nucleus changed by alpha decay

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?