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Published byLucy Eaton Modified over 9 years ago
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Chemical changes occur during chemical reactions. ____________________________________________ ____________________________________________. ________ = substance used in the reaction ________ = substance made by the reaction Yttrium hydride (Y–H) cluster reacts with a rhodium–carbon monoxide (Rh–CO) complex to make a new organic–multimetallic species.
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Start with ___________ Arrows in the middle – reads as “makes” Ends with ___________
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Magnesium - silvery metal, used in fireworks At high temperatures it reacts with oxygen and burns Creates bright, white glow Magnesium + Oxygen → Magnesium Oxide (metal) (gas) (white powder)
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During a chemical reaction 1. No matter __________________ 2. No matter can be destroyed…_______________ Matter is always “_______________”! ____________________= ____________________ Example = Making a cake Mass of ingredients = mass of finished cake (plus water vapor, carbon dioxide)
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When atoms or molecules interact, it can result in three different kind of reactions. 1. Decomposition → 2. Combination + → 3. Replacement + →
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Compounds split apart to form smaller compounds and elements Model = Truck is unhitched from trailer Example = Electricity in water cause hydrogen and helium to break apart
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Elements or compounds come together to make new compounds Model = truck being connected to a trailer Example = Iron and sulfide combine to make iron sulfide (see p. 56)
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Two or more compounds split apart and switch places to make new compounds Model = 2 trucks can switch trailers Example = a burning candle Candles have carbon and hydrogen atoms Breaks apart to make new compound of carbon dioxide and water
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