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20 Cards in this Set
- Front
- Back
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Chemistry
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study of the properties of matter and how matter changes
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Element
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substance that cannot be broken down into any other substances by chemical or physical means
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Compound
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substance made of two or more elements chemically combined in a specific ratio, or proportion
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Mixture
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two or more substances that are mixed together but not chemically combined **not combined in proportion**
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Solution
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well-mixed mixture
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Physical change
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a change that alters the form or appearance of a material but does not convert the material into new substances
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Chemical change
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a change in matter that forms one or more new substances
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Precipitate
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a solid that forms from solution during a chemical reaction
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Molecule
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particle made of two or more atoms bonded together
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Atom
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the smallest particle of an element
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Chemical bond
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the force that holds atoms together
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Chemical equation
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a shorter, easier way to show chemical reactions, using symbols instead of words
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Symbol
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a one-letter or two-letter set of characters used to identify an element
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Chemical formula
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a combination of symbols that represent the elements in a compound
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Subscripts
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the number of atoms of an element in a molecule
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Reactants
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the materials you have at the beginning of a chemical reaction
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Coefficient
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a number placed in front of a chemical formula in the equation
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Synthesis
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put things together
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Decomposition
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break down compounds into simpler products
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Replacement
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when one element replaces another
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