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Classification of Matter. Chemical vs. Physical. Physical Properties: Properties you can observe without changing the substance. ex: size, shape, density, odor Chemical Properties: A substances ability to undergo a transformation to a different substance.
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Chemical vs. Physical • Physical Properties: Properties you can observe without changing the substance. • ex: size, shape, density, odor • Chemical Properties: A substances ability to undergo a transformation to a different substance. • ex: oxidize (rust), combustibility, reacts with acid
Intensive vs. Extensive • Extensive Property: Depends on the amount of matter present. • ex: mass, volume • Intensive Property: Does not depend on the amount of matter present. • ex: color, density
Classification of Matter Matter Can it be separated? Yes No Mixture Pure Substance Can it be broken down by normal chemical means? Is the composition uniform? No Yes Yes No Homogeneous Mixture Heterogeneous Mixture Compound Element
The Periodic Table of Elements Groups: Columns going down Periods: Rows going across
Types of Elements • Metals
Types of Elements • Properties of Metals • Good Conductor • Malleable • Ductile • Luster
Types of Elements • Nonmetals
Types of Elements • Properties of Nonmetals • Poor Conductor • Brittle when solid
Types of Elements • Metalloids – mix of metal and nonmetal properties. Most are semiconductors.