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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.
Which subatomic particle has a negative charge? A: The subatomic particle with a negative charge is the electron. This particle was first identified in 1897. Full Answer >