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What are the most interesting facts about the atom?
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The nucleus of an atom is composed of protons and neutrons. Protons have a positive charge, while neutrons have no charge. The number of protons in an atom determines its chemical properties. Neutrons are slightly heavier than protons and can be found in the nucleus of atoms. Atoms with more protons than neutrons are called “cationic” and those with more neutrons than protons are called “anionic”.