Heavy particles are subatomic particles that have a greater mass compared to lighter particles like electrons. Examples of heavy particles include protons and neutrons, which make up the nucleus of an atom. Their mass plays a crucial role in the structure and stability of matter, influencing how atoms bond and interact with each other. In particle physics, heavy particles can also refer to W and Z bosons, which are responsible for mediating the weak nuclear force. These particles are essential for processes like radioactive decay. Understanding heavy particles helps scientists explore the fundamental forces and interactions that govern the universe.