A chemical reaction in which a compound is broken down (decomposed) into simpler substances.
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Transcript of A chemical reaction in which a compound is broken down (decomposed) into simpler substances.
![Page 1: A chemical reaction in which a compound is broken down (decomposed) into simpler substances.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649e365503460f94b26690/html5/thumbnails/1.jpg)
TOPIC 2 VOCAB
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ANALYSIS
A chemical reaction in which a compound is broken down (decomposed) into simpler substances
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CHEMICAL CHANGE
A reaction in which the composition of a substance is changed
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COEFFICIENT
Number placed in front of a formula to show how many moles of that substance
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DECOMPOSITION
Chemical reaction in which a compound is broken down into simpler substances (analysis)
AB A + B
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DIATOMIC MOLECULE
Molecule containing two identical atoms
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DOUBLE REPLACEMENT
Chemical reaction in which ions exchange places
AB + CD AD + BD
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EMPIRICAL FORMULA
Chemical formula with coefficients in lowest terms
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ENDOTHERMIC
• Chemical reaction that absorbs heat• Heat is on the reactant (left) side of the equation• Products have higher potential energy than reactants
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EXOTHERMIC
• Chemical reaction that releases heat• Heat is on the product (right) side of the equation• Products have less potential energy than reactants
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FORMULA
Symbols and subscripts that represent the composition of a substance
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MOLECULAR FORMULA
Actual ratio of atoms in a substance (not necessarily lowest terms)
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MOLECULE
Smallest unit of a covalently bonded substance
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PHYSICAL CHANGE
Change that does not alter the chemical properties of a substance
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POLYATOMIC ION
Covalently bonded group of atoms that have a net charge and behave as a single unit
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PRODUCT
• Substance formed in a chemical reaction• On the right side of the equation
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QUALITATIVE
Information that cannot be counted or measured
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QUANTITATIVE
Information that can be counted or measured
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REACTANT
• Starting substance in a reaction• On the left side of the equation
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SINGLE REPLACEMENT
Reaction in which a more reactive element replaces a less reactive element in a compound
AB + C AC + B
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SUBSCRIPT
Number written after a symbol that tells how many of that substance
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SYMBOL
A one, two, or three (experimental only), letter designation of an element
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SYNTHESIS
Chemical reaction in which two or more substances chemically combine to form one substance
A + B AB
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TOPIC 3 VOCAB
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FORMULA MASS
Sum of atomic masses of all atoms
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GRAM FORMULA MASS
Formula mass expressed in g rather than in u
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MOLE
• 6.02 x 1023 particles• Number atoms present on 12.000g of carbon-12
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PERCENT COMPOSITION
Percent of each element compared to the total mass of the compound