Subatomic particles are the building blocks of atoms, which make up all matter in the universe. The three main types of subatomic particles are protons, neutrons, and electrons. Protons and neutrons are found in the nucleus of an atom, while electrons orbit around the nucleus. Protons carry a positive charge, neutrons are neutral, and electrons have a negative charge. These particles play a crucial role in determining the properties of elements. The number of protons in an atom defines its element, while the arrangement of electrons influences its chemical behavior. Understanding subatomic particles is essential for studying chemistry and physics.