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| any thing that takes up mass or space |
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| it is a measure of the mass of an object divided by it's volume |
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| tiny buliding blocks of matter, made up protons, neutrons, and electrons |
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| a substance that contains only one type of atom and cannot be broken down by normal chemical or physical means |
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| a positively charged particle that is located in the necleus of an atom |
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| a paricle without an eletrical charge that is located in the nucleus of an atom |
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| negatively charged particles that move around the necleus of an atom and form and electron cloud |
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| the number of protons in an atom |
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| the number of protons plus the number of neutrons in an atom |
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| atoms of the same element that have diffrent numbers of neutrons |
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| any characterstic of a material such as state,color, and volume that can be observed or measured without changing or attempting to change the material |
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| temputure at which a solid becomes a liquid |
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| tempature at which a substance in a liquid state becomes a gas |
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| change in which the properties of a substance change but the identity of the substance always remains the same |
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| physical propertie that is dependent on both temperature and pressure and occurs in four forms |
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