Term
| What are the two kinds of changes matter can undergo? |
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Definition
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Term
| What do the physical changes in a substance affect? |
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Definition
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Term
| What do the chemical changes produce? |
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Definition
| new substances that have properties different from those of the original substances |
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Term
| What is a process that produces chemical change? |
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Definition
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Term
| What are the substances that react called? |
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Definition
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Term
| Reactants are the substances that exist before what? |
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Definition
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Term
| What are the substances that form as a result of the reaction called? |
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Definition
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Term
| What tells chemists at a glance the reactants, products, physical state, and the proportion of each substance present? |
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Definition
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Term
| Chemical names are usually used in what instead of common names? |
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Definition
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Term
| What tells you the number of atoms of each element in that compound? |
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Definition
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Term
| According to what, the mass of the products must be the same as the mass of the reactants in that chemical reaction |
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Definition
| law of conservation of mass |
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Term
| In what kind of reaction are the products more stable and their bonds have less energy than those of reactants |
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Definition
| reactants that release energy |
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Term
| What kind of reactions absorb heat energy? |
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Definition
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Term
| What kind of reaction releases heat energy? |
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Definition
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