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atom: the smallest particle of an element taht has the same chemical properties as the element.
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nucleus: a n atom's dense center, where most of its mass is.
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electron: anegatively charged particle that moves around an atom's nucleus.
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proton: a positively charged particle inside an atom's nucleus.
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neutron: a particle with no charge inside an atom's nucleus.
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atomic number: the number of protons in an atom.
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metal: a ny of a group of elements that conduct heat and elctricity, is shiny and bendable.
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