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Science Chemical Formula Vocab.
Chemical Formulas
18
Science
7th Grade
11/08/2011

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Term
Reactants
Definition
are formed on the left side of the yield sign in a chemical equation.
Term
Products
Definition
are formed on the right side of the yield sign
Term
Subscript
Definition
is a number that is written halfway above and halfway below the line
Term
Coefficient
Definition
 is a number that is written in front of a chemical formula
Term
Chemical Reaction
Definition

A process in which one or more substances make one or more newer substances


Term
Chemical Formula
Definition
a combination of chemical symbols and numbers to represent a substance
Term
Mass
Definition
the measure of the amount of matter in a object
Term
Compound
Definition
a substance made up of two or more diffucult elements joing by chemical bonds
Term
Chemical Change
Definition
a change that occurs when one or more substances change into an entirely new substance with different properties
Term
Physical Change
Definition
a change of matter from one form to another without a change in chemical properties
Term
Synthesis Reaction
Definition
a reaction in which two or more substances combine to form a new compound
Term
Single-Displacement Reaction
Definition
a reaction in which one element takes place of another element in a compound
Term
Decomposition Reaction
Definition
a reaction in which a single compound breaks down to form two or more substances
Term
Double-Displacement Reaction
Definition
a reaction in which a gas, a solid, a solid precipate, or molecules compounds forms from the exchange of ions between two compounds
Term
Synthesis Reaction
Definition
Al + Cl2  -> AlCl3
Term
Decomposition Reaction
Definition
C2CO3 -> H2O + CO2
Term
Single-Displacement Reaction
Definition
Zn + HCl -> ZnCl2 + H2
Term
Double-Displacement Reaction
Definition
NaCl + AgF -> NaF + AgCl
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