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chapter 3
chapter 3
21
Chemistry
7th Grade
12/15/2008

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Term
Mixture
Definition
Matter that consists of two or more substance mixed but not chemiclly combined combiand
Term
Heterogeneous
Definition
Substance that does not appear to be the same through out
Term
Homogeneous
Definition
Mixtuer that appears the same through out
Term
Colloid
Definition
Homogeneous mixture in wihch the particals are mixed together but not dissolved
Term
Solution
Definition
Homogeneous mixture in one substance is dissolved in another
Term
Solute
Definition
Substance that is dissolved in a solution
Term
Solvent
Definition
Substance that does the dissolving in a solution
Term
Soluble
Definition
Can be dissolved in water
Term
Insoluble
Definition
Unable to be dissolved in water
Term
Solubility
Definition
The amount of a solute that can be completly dissolved in a given amount of solvent at specific tempeture
Term
Alloy
Definition
A solution of two metals or a metal and a non metal, that has the properties of metal
Term
Pure substance
Definition
Substance made of one kind of materials having definite properties
Term
Elements
Definition
Simplest type of pure substance
Term
Atom
Definition
Smallest particle of an element that has all the properties of the element
Term
Chemical symbol
Definition
Short hand way of representing an element
Term
Compound
Definition
Substance made up of molecules that contains more than one kind of atom, two or more elements chemicly combined
Term
molecule
Definition
Structure made up of two or more atoms
Term
chemical formula
Definition
combination of chemical symbols used to represent a compound
Term
subscript
Definition
number placed to the lower right of a chemical symbol to indicate the number of atoms in the compound
Term
chemical equation
Definition
expression in which symbols, formulas and numbers are used to represent a chemical reaction
Term
Coefficient
Definition
number that is placed in front of a symbol or formula in many chemical equation that indicate how many atoms or molecules of this substance are invovled in the reaction.
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