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Chapter 3 Notes 2

Page history last edited by lago 10 years, 11 months ago

Chapter 3: Notes 2

Unit:1

Topic: Matter

Book Section(s):3.3 and 3.4

Date: 2/10/09

 

Cue

Notes                            

3.3 "Elements and Compounds" 

 

Element-

 

Compounds-

 

 

 

3.4 "Mixtures and Pure Substances"

 

Mixture-

 

 

Pure Substance-

 

 

Homogeneous Mixture-

 

Heterogeneous Mixture-

 

 

 

 

 

a substance that cannot be decomposed into simpler substances by chemical or physical means. (ex. iron, aluminum, oxygen, & hydrogen)

a substance with constant composition that can me broken down into elements by chemical processes. (ex. water) 

- a compound always has the same composition or combonation of atoms

 

 

 

 

something that has variable composition. (ex. wood, wine, water pumped from deep in the earth) 

 

either an element or a compound; always has the same composition (ex. pure water H2O)

 

a mixture that is the same throughout (ex. salt stirred into water)

 

A mixture with different sections that have different properties (ex. sand and water) 

 

 

 

 

 

 

Summary:

 

 

 

 

 

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