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Econ AP Essay Preview: Econ AP Report this essay Atoms Smallest unit of matter Made of protons electrons and neutrons Has protons and neutrons packed together in a nucleus The electrons orbit around Atomic number Written as a subscript next to the symbol of an element Number of protons (and hence number of electrons) of.
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Atomic Number Of AluminumCovalent BondDifferent Number Of NeutronsProtons Electrons