place a few drops of alcohol on the cheesecloth that is attached to the tip of a thermometer. gently wave it around. what happens to the temperature?

Alpha (α), beta (β-) and gamma (γ) decay. When the nucleus of an atom possesses either too many or too few neutrons compared to the number of protons it becomes unstable. These are called radioactive isotopes. Unstable nuclei split up in a process called radioactive decay and emit radioactive radiation.