(8th) Chapter 2-1 Cornell Notes

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(8th) Chapter 2-1 Cornell Notes “Describing Matter”

(8th) Chapter 2-1 Cornell Notes matter- substance- physical property- chemical property- element- atom- chemical bond- molecule- compound- chemical formula- mixture- heterogeneous mixture- homogeneous mixture- solution- (8th) Chapter 2-1 Cornell Notes Key Terms

(8th) Chapter 2-1 Cornell Notes Key Questions What kinds of properties are used to describe matter? What are elements, and how do they relate to compounds? What are the properties of a mixture?

(8th) Chapter 2-1 Cornell Notes Paragraph 1 matter: has mass, takes up space; chemistry: study properties of matter and its changes; substance: single kind of pure matter.

(8th) Chapter 2-1 Cornell Notes physical property: substance not changed (i.e. color, hardness, ability to dissolve in water); chemical property: substance changes into other substances (i.e. burning, rusting). Paragraph 2

(8th) Chapter 2-1 Cornell Notes Paragraph 3 elements: make up matter; elements: pure substances, cannot be broken down further; atoms: basic particle makes up elements; chemical bond connects atoms; atoms combine to make up molecules (i.e CO2)

(8th) Chapter 2-1 Cornell Notes Paragraph 4 elements combine to form compounds; compound: pure substance of 2+ elements; chemical formula can represent compound; shows elements, ratio of atoms (i.e. CO2).

(8th) Chapter 2-1 Cornell Notes Paragraph 5 most materials mixtures; mixture: 2+ substances in same place but not chemically combined; 1. each substance in mixture stays pure; 2. parts of mixture not combined in set ratio.

(8th) Chapter 2-1 Cornell Notes Paragraph 6 (8th) Chapter 2-1 Cornell Notes mixture heterogeneous or homogeneous; heterogeneous mixture: you see different parts; homogeneous mixture: so evenly mixed can’t see parts (example: solution like air); unlike compounds mixtures easily separated into parts.