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A subatomic particle is a unit of matter or energy that's the fundamental makeup of all matter. According in modern atomic theory, an atom has a nucleus, which is its center, or core. The nucleus contains subatomic particles: protons and neutrons. Protons are positively-charged particles.
What is the subatomic particle theorized to be among the basic unit of matter? Plasma What is the state of matter in which atoms have been stripped of their electrons? Alpha Particle, Beta Particle, Gamma Ray What are the three types of nuclear radiation?