Answer:
An alpha particle is a type of subatomic particle consisting of two protons and two neutrons, symbolized as α.
Step-by-step explanation:
It is essentially a helium-4 nucleus. Alpha particles are relatively large and heavy compared to other types of particles, and they have a positive electric charge. Due to their size and charge, alpha particles have low penetration capabilities and are easily stopped by materials like paper or human skin. They are commonly emitted by certain types of radioactive materials during a process known as alpha decay. The emission of alpha particles plays a role in nuclear reactions and the behavior of certain radioactive isotopes.