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Chemistry Unit 2
Unit 2 From The Review Book
15
Chemistry
10th Grade
01/12/2011

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Term
Physical Change
Definition
Term
Chemical Change
Definition
Term
Exothermic Reaction
Definition
Term
Endothermic Reaction
Definition
Term
Reactant
Definition
A starting substance in a reaction.
Term
Product
Definition
A substance formed in a chemical reaction.
Term
Synthesis
Definition
A reaction in which 2 or more substances combine to form one product.
Term
Decomposition
Definition
Term
Single Replacement
Definition
A reaction in which an element replaces a less reactive element in a compound.
Term
Double Replacement
Definition
Term
Polyatomic Ion
Definition
A covalently bonded group of atoms that have a net electric charge.
Term
Analysis
Definition
A chemical reaction in which a compound is broken down (decomposed) into simpler substances.
Term
Empirical Formula
Definition
Term
Molecular Formula
Definition
Term
Molecule
Definition
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