Term
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Definition
substance made of one kind of materials having definite
properties |
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Term
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Definition
| pure substance made of only one type of atom |
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Term
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Definition
| pure substance made up of two or more elements which have been chemically joined |
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Term
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Definition
| smallest unit of a compound |
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Term
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Definition
combination of chemical symbols used to represent a compound |
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Term
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Definition
| expression in which symbols, formulas, and numbers are used to represent a chemical reaction |
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Term
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Definition
| Number in front of a chemical equation that tells how many molecules are involved in the reaction |
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Term
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Definition
shows the number of atoms of an element in a molecule |
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Term
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Definition
| materials present before a reaction |
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Term
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Definition
materials present after a reaction |
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Term
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Definition
matter cannot be created nor destroyed during a chemical reaction |
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