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Chapter 1
Chemistry
21
Science
8th Grade
09/29/2010

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Term
Compound
Definition
a pure substance compsed of two or more elements that are chemically combined
Term
Mixture
Definition
a combination of tow or more substances that rent chemically combined
Term
Mass
Definition
the amount of matter that something is made of
Term
Volume
Definition
The amount of space that something occupies the amount of space that soemthing contains
Term
Density
Definition
the amount of matter in a given space; mass per unit volume
Term
Atom
Definition
the smaller practice into which an element can be divided and still be the same substance
Term
Molecule
Definition
a neutral group of atoms held together by covalent bonds
Term
Matter
Definition
anything that has a volume and mass
Term
Element
Definition
pure substance that canno be separated or broken down into simpliar substances by physical or chemical means
Term
Symbol
Definition
-A capital letter
-Capital letter and small letter
-Stands for the element
Term
Electrolyte
Definition
In a cell a mixture of chemicals that carries an electric current
Term
Chemical Change
Definition
a change that occurs when one or more entirlet new substance with different properties
Term
Physical Change
Definition
a change that affects one or more physical properties changes are easy to undo
Term
Chemmistry
Definition
Study of chemicals
Term
Constant Ration
Definition
In every chemical reaction the ratio will always be the same
Term
Name 8 physical properties
Definition
-Odor -Color -Thermal Conductivity
-State -Mallability -Ductility
-Solubility -Density
Term
What matter is chemically combined?
Definition
Chemical Change
Term
What are the measurments for mass, volume, and density
Definition
Mass- Grams
Volume- Cubic ...
Density- Grams per milimeter
Term
What are the formulas for volume and density
Definition
D=M/V
V=L*W*H
Term
Know how the 6 atomic laws are used
Definition
1.Atoms cant be broken
2.All atoms in an element are exactley the same
3.Atoms of diff. elements are diff. 4.Atoms of two or more elemnets can combine to form compound
5.Atoms are unique
6. Compound are always going to be constant ratio
Term
What was Dalton known for?
Definition
6 atomic laws
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