chemical reactions
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Activation energy | what is needed to start a chemical reaction
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| arrow | you read the arrow as yields in a chemical equation or formula
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| characteristics of a chemical reaction | changes in energy or changes in properties
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| chemical changes | alter the chemical properties of matter
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| coefficiant |
a number placed in front of a chemical formula in an equation
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| conservation of mass | the amount of matter invlolved in a chemical reaction does not change
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| decomposition reaction | a compound breaks down in simpler substances
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| endothermic reaction | an observable change in energy that shows a chemical reaction took place
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| exothermic reaction | an observable change in energy that show a chemical reaction took place
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| physical changes | alter only the physical properties of matter
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| precipitate | a solid that forms from a solution during a chemical reaction
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| products | the materials you have after a chemical reaction
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| reactants | the materials you have at the beginning of a chemical reaction
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| replacement reaction | one part of a compound is displaced by an element or compound from another substance.
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| states of matter | solid liquid gas
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| subscripts | show the number of an element in a molecule or the ratio of elements in a compound
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| synthesis reaction | 2 substances combine to form a new compound
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