Basic Chemistry Concepts

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Protons

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The positively charged part of an atom, found in the nucleus

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Neutrons

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A part of the atom, located in the nucleus, that has no charge

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Electrons

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Element

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A substance that is made of only one type of atom

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Compound

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A substance that is made of more than one type of atom bonded together

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Mixture

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A combination of two or more substances that are not chemically bonded together and can be easily separated

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Atom

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The smallest part of an element that cannot be broken down any further by chemical means

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Atomic Number

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The number of protons (and electrons) in an atom; The periodic table is organized according to this number

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Atomic Mass (weight)

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The mass of an atom, which is almost exactly equal to the number of proton and neutrons in an atom

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Nucleus

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The central part of an atom that contains virtually all of the atoms mass