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12 cards from this deck
Protons, neutrons, electrons
Positive charge, found in nucleus
Neutral (no charge), found in nucleus
Negative charge, orbit around nucleus
Number of protons in an atom
Unique to each element, identifies which element
Equal number
Positive and negative charges balance out
Protons + neutrons
Mass number - atomic number
Nucleus (protons and neutrons are heavy)
Atoms that have gained or lost electrons
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