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: