Electron Shell - The path where tiny, negatively charged electrons move around an atom's center., Atomic Nucleus - The small, dense center of an atom containing protons and neutrons., Proton - A positively charged particle found in the nucleus of an atom., Electron - A tiny, negatively charged particle that orbits the nucleus of an atom., Neutron - A particle found in the nucleus of an atom that has no electric charge. It stabilizes the atomic nucleus.,

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