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the principle stating that matter is not created or destroyed during a chemical reaction atom
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shows the atom's symbol, mass number, and atomic number
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The number of protons in the nucleus of an atom
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the sum of the number of neutrons and protons in an atomic nucleus
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the particles of the nucleus that have no charge
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Atoms of the same element that have different numbers of neutrons
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A region that is located at the center of an atom and contains most of the atom's mass
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Positively charged particles
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he principle stating that matter is not created or destroyed during a chemical reaction atom
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