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| Cannot be broken down; the smallest unit of matter |
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| two or more different elements chemically combined |
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The same throughout
Used to describe uniform mixtures |
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Varied composition;
describes mixtures that are not uniform |
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| Energy required to melt (or freeze) a substance at it's melting point |
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| Energy required to vaporize (or condense) a substance at it's boiling point |
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A characteristic of a substance that can be observed without having to change the substance:
Examples: color, odor, phase, texture, density, boiling point, solubility |
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| A characteristic of a substance that can be observed if the substance reacts chemically |
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| The amount of heat required to increase the temperature of a substance by 1 degree Celsius |
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