PART_5 WHAT IS SUBATOMIC PARTICLES?Subatomic particle, any of various self-contained units of matter or energy that are the fundamental constituents of all matter. Subatomic particles include electrons, the negatively charged, almost massless particles that nevertheless account for most of the size of the atom, and they include the heavier building blocks of the small but very dense nucleus of the atom, the positively charged protons and the electrically neutral neutrons.What is the definition of a subatomic particle in chemistry?A Subatomic particle is nothing but a particle which is smaller than an atom in size.What are the three types of subatomic particles?There are three subatomic particles: protons, neutrons and electrons.What is an example of a subatomic particle?Subatomic particles are particles that are smaller than the atom. Protons, neutrons, and electrons are the three main subatomic particles found in an atom.