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9 Cards in this Set
- Front
- Back
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What is Chemistry?
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Chemistry is the study of chemicals, their properties, and the reactions in which they are involved.
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Atom
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The smallest unit of an element that maintains properties of that element.
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Molecule
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Smallest unit of a substance that maintains chemical and physical properties of that substance. Can consists of one or more atoms.
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Heterogeneous
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Composed of dissimilar components. eg. salad
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Pure Substance
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A sample of matter that has definite chemical and physical properties.
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Compounds
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Joined by chemical bonds. eg. carbon dioxide (mixture of carbon and oxygen chemically joined)
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Mixture
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Combination of substances that are not chemically combined. eg. gold (cause it's usually not pure; normally mixed with some other metal)
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Density
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The ratio of Mass to Volume
D= m/V Density is expressed as grams/^3cm for and grams/liter for gases. |
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Homogeneous
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Uniform structure or composition. eg. air (mixture is not recognizable)
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