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| anything that has mass and takes up space |
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| a substance that cannot be separated or broken down into simpler substances by chemical means |
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| the smallest unit of an element that maintains the chemical properties of that element |
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| a group of atoms that are held together by chemical forces; the smallest unit of matter that can exist by itself and retain all of a substance’s chemical properties |
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| a substance made up of atoms of two or more different elements joined by chemical bonds |
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| a sample of matter, either a single element or a single compound, that has definite chemical and physical properties |
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| a combination of two or more substances that are not chemically combined |
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| a mixture in which the substances are not evenly distributed |
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| a mixture in which the substances are evenly distributed |
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| characteristics that can be observed without changing the identity of the substance |
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| the temperature and pressure at which a solid becomes a liquid |
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| the temperature and pressure at which a liquid becomes a gas |
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| the ratio of the mass of a substance to the volume of the substance |
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| the capacity of a substance to combine chemically with another substance |
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| how a substance changes into a new substance, either by combining with other elements or by breaking apart into new substances |
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| a change of matter from one form to another without a change in chemical properties |
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| a change that occurs when one or more substances change into entirely new substances with different properties |
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